We are planning a 6-day summer trip to Y

Answer

I'll pull your family profile, the trip template, and the relevant reference cards in parallel, then write `trip.json`, run the check script, and come back with the structured plan.

Let me check the existing `trip.json` (looks like there's a prior skeleton) and the check script.

I have everything I need except a couple of numbers that need official sourcing (booking windows, bear spray rules). Let me verify those in parallel, then write `trip.json`.

Let me read the official pages to anchor the numbers and rules.

I have everything I need. Writing `trip.json`, then I'll run the check.

`trip.json` saved and `ok: true`. Here's the structured plan. **I do not book, hold, or reserve anything** — this is a planning map and a checklist, not a confirmation. Both concessionaire booking windows for July 2027 (assumed) are already open, so the booking sequence is the most time-sensitive part.

---

## Headline answer to your 5 questions

**1. Base strategy — pick 2, not 1, not 3.** ecommend **West Yellowstone 4 nights + Colter Bay (Grand Teton) 2 nights**. Single-hub means ~3 hr round-trip drives every other day from West Yellowstone to the Tetons; 3-base adds a repack the in-laws and the toddler don't need. Two unpacks in 6 nights is the right balance.

**2. Pacing — anchor in the morning, nap at the lodging, scenic only after 4 PM.** With a 3yo down 1:30–3:30 PM and 70yo joints that tire on steep boardwalks, the day's shape is: leave lodging 7:30 AM → one anchor activity → lunch + return by 12:30 → mandatory nap + grandparent rest → one flat scenic drive or pullout at 4:30–6:30 → dinner by 7:30. No anchor after 11 AM.

**3. Accessible boardwalks vs. avoid list** — see tables below.

**4. Overflow / bad-weather / parking fallbacks** — see *Bad-weather & overflow moves* below. The two specific questions (Midway and Lamar) have hour-by-hour fallbacks.

**5. Booking sequence** — see *预订表 / Booking checklist* (the 7-item matrix). The critical time pin is **today/this week**: for July 2027 dates, Xanterra opened the rolling July 2027 block on **June 5, 2026**, and GTLC opened theirs in June 2026 — the July weekends are already partly gone.

---

## Schedule

**Family priority / trip success = "Slow down and look."** One flat anchor in the morning, lunch + nap at the lodging, scenic pullouts at sunset, dinner early. Anything that fights that shape gets cut, not crammed.

**ecommended skeleton — 2 bases:**

| Day | Where | Anchor (morning, before 11:30 AM) | echarge window (1:30–3:30 PM) | Evening (after 4 PM) |
|---|---|---|---|---|
| 1 | Arrive BZN → Bozeman or West Yellowstone | Drive 1.5 hr; light dinner | At lodging | Stroll lodging block, sleep early (altitude) |
| 2 | West Yellowstone base | Upper + Lower Geyser Basin boardwalks (Old Faithful area) | Nap at lodging | Optional Old Faithful eruption walk (paved) |
| 3 | West Yellowstone base | Midway Geyser Basin boardwalk — **before 8 AM** | Nap at lodging | Grand Canyon rim pullouts + Hayden Valley wildlife drive at sunset |
| 4 | West Yellowstone base | Lamar Valley dawn O rest day at Grizzly & Wolf Discovery Center | Nap at lodging | West Thumb Geyser Basin (flat lakeshore boardwalk) + sunset picnic |
| 5 | Drive to Colter Bay (~2 hr via South Entrance) | Drive + Colter Bay flat lakeshore walk on arrival | Nap at cabin | Mormon ow sunset pullouts |
| 6 | Colter Bay base | Jenny Lake VC flat area + Chapel of the Transfiguration pullout + Signal Mountain road pullouts | Nap at cabin | Oxbow Bend pullout, pack for flight |
| 7 | Departure | Sightseeing = zero; 45-min drive to JAC | — | — |

**Two bases rejected, with reasons:**

- **Single base (5 nights West Yellowstone + 1 night near JAC):** West Yellowstone → Grand Teton sights is ~2 hr one-way each time. Doing it as a day trip means 4+ hours of driving on the day you'd most want a nap window. Not recommended.
- **Three bases (Bozeman 1 + West Yellowstone 3 + Colter Bay 2):** The Bozeman overnight is only worth it if your BZN flight lands after 6 PM. With early-July afternoon arrivals you can comfortably reach West Yellowstone the same day. Three unpacks for one travel day is a worse trade.

---

## Accessible boardwalks (do these) vs. trails to skip

**Do — flat, paved or boardwalk, ≤ 1.5 mi round-trip, low grade:**

| Spot | What it is | Why it works |
|---|---|---|
| Old Faithful area — Upper Geyser Basin boardwalk (partial loop) | Flat boardwalk loop past Old Faithful, Castle, Grotto, Morning Glory | Paved, benches, eruption predictions posted |
| Midway Geyser Basin boardwalk | Flat out-and-back to Grand Prismatic Spring overlook | Wide, paved, benches; **go early to dodge parking** |
| West Thumb Geyser Basin boardwalk | Small flat loop on Yellowstone Lake shore | ~0.5 mi, benches, lake views |
| Norris Porcelain Basin overlook | Paved overlook path (not the full basin loop) | Short, flat, geothermal color |
| Canyon Village rim pullouts (Lookout Point, Grand View) | Paved pullouts only — **do not descend to Brink of Lower Falls** | Vehicle-accessible, minimal walking |
| Hayden Valley | Drive + pullouts only | Best wildlife from the car |
| Colter Bay lakeshore | Flat shoreline trail | Lake + Tetons view, on-site facilities |
| Mormon ow | Drive-up barn pullouts | Flat, paved, iconic photo stops |
| Signal Mountain road pullouts + Oxbow Bend | Paved pullouts | iver-bend view of Tetons, zero walking needed |

**Strictly avoid with this party:**

| Trail | Why not |
|---|---|
| Uncle Tom's Trail (Canyon) | ~328 stairs down + return; one of the most common "we tried it and regretted it" reports |
| Brink of Lower Falls stairway | Steep metal switchbacks; one-way stairs |
| Mount Washburn (any approach) | High altitude + 3 mi steep climb |
| Storm Point (Lamar) | olling lava-rock, uneven — bad for bad knees |
| Elephant Back Mountain (Lake area) | Steady climb |
| Avalanche Peak (East Entrance) | Class-1 scramble, no boardwalk |
| Fairy Falls/Grand Prismatic Overlook (hill climb) | Unimproved dirt hill; the overlook view is great but the climb is not for in-laws |

**Pattern rule:** if the trail name on the NPS page contains "strenuous" or "moderate," it's out. Boardwalk or pavement only.

---

## Bad-weather & overflow moves

**Midway Geyser Basin (your specific question):**

| Problem | Move |
|---|---|
| Midday parking full | Arrive **before 8:00 AM** O after **6:30 PM** (sunset is ~9:15 PM in early July; lighting is still workable for the overlook until ~8:30 PM). |
| Hot midday sun + grandparents wilting | Do it as the morning anchor of Day 3 (early start), then drive straight to Canyon Village for lunch. |
| aining / thunderstorm | **Skip Midway that day** — the boardwalk has no shelter. Drive to Grizzly & Wolf Discovery Center (West Yellowstone) instead; covered, all-indoor, 2 hr works for the toddler. |
| Boardwalk closed for repair | Switch to **Black Sand Basin** (small flat boardwalk ~1 mi north of Old Faithful) or **Biscuit Basin** — same geyser style, fraction of the crowd. |

**Lamar Valley (your specific question):**

| Problem | Move |
|---|---|
| Dawn = best wildlife, but toddler + 70yo can't do 5 AM | Skip dawn. Aim for **8:00–10:30 AM** — wolves/bears still possible; bison herds always; much kinder on the family. |
| aining / low visibility | Wildlife viewing is poor in rain. eplace the whole morning with the **Grizzly & Wolf Discovery Center** in West Yellowstone (covered, grizzlies and wolves on exhibit, kid-friendly). |
| Want more wildlife viewing | Drive the parallel **Hayden Valley** instead — closer to Canyon Village, less driving from West Yellowstone, same pullout-based viewing. |
| Lunch on the road with nap pressure | Plan to be **back in West Yellowstone by 12:30** for nap; don't try to loop Lamar → back through Northeast Entrance (longer drive). |
| Bear jam (everyone pulled over) | Do **not** exit the car in a bear jam. In-laws stay in vehicle; toddler in car seat. If the bear is visible from a pullout, view from inside; if not, drive on. |

**General rainy-day menu (replaces any outdoor anchor):**

- Grizzly & Wolf Discovery Center (West Yellowstone) — covered, kid engages, grandparents can sit.
- Yellowstone IMAX / Yellowstone Giant Screen Theater (West Yellowstone) — sit-down, ~40 min.
- National Park Mountain Shop / Museum of the National Park anger (near Old Faithful) — small but covered.
- If you're already in-park on a thunderstorm day, drive the Grand Loop slowly with short stops; do **not** walk on boardwalks in electrical storms (NPS warning).

**Park entry & fees (verify field on nps.gov ~2 weeks before departure):** standard $35/vehicle 7-day pass at Yellowstone; Grand Teton entry is separate unless you're holding an America the Beautiful Interagency Pass — verify the "coupled park" treatment on the official page before you drive in, because this has changed in past years.

---

## Booking checklist (the 7 items, plus your bear-spray timeline)

| # | Item | ecommended action |
|---|---|---|
| 1 | **Age band matrix** | Air/Hotel/Car: the 3yo is a **lap child under-2 on the date of flight** is *not* your situation — 3yo is a "child" on all US carriers, requires a seat + car seat; in-laws are adult. Hotel: 3yo usually free in-room; verify each property's "max occupancy" includes the toddler (most chains count age 0–17 as "children"). ental car: toddler needs a car seat — book a **booster or 5-pt harness** with the rental (not all locations stock them; reserve now). |
| 2 | **City sequence + nights** | Bozeman (BZN) → West Yellowstone 4 nights → Colter Bay 2 nights → Jackson (JAC) — matches `trip.json` |
| 3 | **Air–hotel date alignment** | Inbound arrives BZN Day 1; outbound JAC Day 7 morning. If the inbound is a late arrival, add an **anchor-night in Bozeman** (it's 10 min from BZN) to avoid driving in the dark with the toddler. Align: flag any "wrong-night" risk before paying. |
| 4 | **oom capacity** | 5 people (2 adults + toddler + 2 grandparents) = **one room usually won't fit**. Plan **two rooms**, or one suite with a sleeper sofa. At Old Faithful Inn, Mammoth, Lake Yellowstone, Canyon Lodge and the GTLC properties, confirm "max occupancy" includes a 3-year-old. In-laws ideally get their own room — early bedtime, post-dinner decompression matters with knee OA. |
| 5 | **Connection type** | One-way BZN → JAC on different airlines (or same airline through a hub) is **self-transfer**: book on a single ticket if possible. Self-transfer with checked bags + a toddler + grandparents = **red flag**. If you must split, carry-on only and pad the layover to ≥3 hr. |
| 6 | **Booking actions (in order)** | See the timeline table below. |
| 7 | **No-booking line** | I do not reserve, hold, or charge. All actions below are yours to execute on the listed websites. |

**Booking timeline (in the order you'd actually act):**

| When (counted back from Day 1) | Action | Status | Where to look | What to verify on the page |
|---|---|---|---|---|
| **This week** | Book **Xanterra** in-park Yellowstone lodging (or West Yellowstone gateway hotels if in-park is full) | Not booked | yellowstonenationalparklodges.com | "13-month rolling window" — for July 2027 dates, the July 2027 block opened June 5, 2026 |
| **This week** | Book **GTLC** at Colter Bay Village (or Jackson Lake Lodge as backup) | Not booked | gtlc.com or 307-543-3100 | "12-month rolling" — for July 2027 dates, the July 2027 block is open |
| **Within 2–4 weeks** | Book **inbound flight to BZN** and **outbound from JAC** (separate tickets = self-transfer risk) | Not booked | Airline direct or one-ticket comparison | Same-day arrival/departure dates; BZN late? Add Bozeman anchor night. |
| **Within 4–6 weeks** | Book **rental vehicle**: full-size SUV class (Suburban / Tahoe / Expedition) or minivan; **reserve a child car seat now** — counters do run out in summer | Not booked | Turo, Hertz, Avis, National, etc. (compare one-way drop fee) | One-way drop fee; 4WD/AWD not required in July but higher clearance helps on any unpaved pull-offs |
| **Day before / Day 1 of trip** | **Do NOT fly with bear spray** (prohibited). Plan to buy at EI/Sportsman's Warehouse near BZN or at a West Yellowstone outfitter on arrival. | Not acquired | EI Bozeman, Sportsman's Warehouse, or West Yellowstone outfitters | EPA-approved specifically for bears; check expiration; one can per adult (in-laws should each carry one as well); the toddler does not carry |
| **Day 1 or 2 of trip** | Optional: rent vs. buy. Bear Aware (concessioner) has **rental kiosks at Canyon Visitor Education Center and Old Faithful** — easier than buying for one trip. | Not acquired | bearaware.com or in-park | ental fee per day, drop-off at the same kiosks when done; cannot ship the can home — must dispose at Bear Aware drop-off points |
| **Day 1 of trip** | Buy **park entry passes** at the entrance station (cash or card) or buy an **America the Beautiful Interagency Pass** in advance if you'll do any other federal-recreation land | Not acquired | nps.gov / yourfitness.updatemyprofile.com / store.usgs.gov | "Yellowstone + Grand Teton coupled pass" treatment — confirm field name on the NPS page before driving in |

**Why the order matters:** in-park concessionaire lodging (Xanterra and GTLC) is the bottleneck. In July, weekends inside the parks sell out 6–9 months ahead; West Yellowstone gateway hotels fill 3–4 months ahead. Flights into BZN are fine 2–4 months out for summer. ental cars at BZN tighten in July but bookable 6–8 weeks out. Bear spray is local — wait until you arrive.

---

## Gaps I need from you (only 2 will change the plan)

1. **Exact dates / year.** I'm assuming **early July 2027** because today is Sept 2026 and that's the next plausible "early July." If you mean July 2026, the lodging windows are already closed for some properties — say the word and I'll redraw. If you have flexible dates in July, **shift to weekday nights mid-week** (Mon–Wed) at in-park concessions — materially easier than weekends.
2. **Home departure airport.** You said BZN in / JAC out. I need your home airport to advise on inbound flight + connection type (one-ticket vs. self-transfer).

Everything below those two: I'll keep working from the assumption row in `trip.json` and you can correct one line to recompute. Open the file with me when you want a change — I won't rewrite it from the chat.

---

## eminders before you go

- **e-read the four official pages above ~2 weeks before departure** — road construction (Yellowstone bridge work shifts year to year), bear spray rules, concessionaire opening hours, and park pass field names can all change.
- **Altitude soft start** — the in-laws and toddler are coming from low elevation most likely. Day 1 and Day 2 should be the lightest of the week; defer any heavy outing to Day 3+.
- **Health history for the in-laws** — if they have hypertension, cardiac history, or COPD on top of the knee OA, the elevation is worth a quick conversation with their family doctor before booking.
- **Park entry fee field name** — verify on nps.gov whether the current period's fee is "$35 per vehicle (7-day)" or has changed; I've not cached the dollar amount for 2027 because it can change each spring.

PDF of this plan (if you want it for the in-laws or to print): say the word and I'll render one to (internal file path omitted). Family reminder for the "two-week-out recheck": I can set that as an Asia/Shanghai-time reminder if useful.