When to go to Seattle
Late June through mid-September is the season, unambiguously: under an inch of monthly rainfall, Mount Rainier and Olympic loop roads fully open, all dump stations active, and city highs in the low-to-mid 70s. The reservation mechanics inside that window are the trip's real difficulty — Cougar Rock at Rainier releases on a 6-month rolling window at 7 a.m. Pacific and weekend sites go in under two minutes, while Kalaloch on the Olympic coast staggers its releases at 6 months, 2 weeks, and 4 days. November through February is the season to skip: chain requirements on the passes for RVs over 10,000 pounds, 17-plus rain days a month, and 4:20 p.m. sunsets. One event note: Seafair's Blue Angels windows (typically early August) close I-90 midday and push nearby park rates 2-3x.
Where the trip actually bases in Seattle
Every place below comes from the Seattle arrival guide.
Trailer Inns RV Park of Bellevue
The close-in base 9 miles east: 100% full-hookup sites with 15/30/50-amp service for rigs to 67 feet, free cable, and an indoor pool at about $70 a night — the practical answer to Seattle's overnight street rules. Its dump also takes drop-ins at $15 during office hours, useful on a through-route.
Issaquah Village RV Park
The east-of-I-405 one-stop the guide singles out: full hookups at $75 with drive-through propane bays sized for Class A rigs to 45 feet and fifth-wheels on site, plus a $10 dump. Fill propane, dump tanks, and sleep in one address before pointing at the mountains — no other metro stop compresses the checklist like this.
2 more places around Seattle
Cougar Rock Campground (Mount Rainier NP)
The Rainier objective, 95 miles out: rigs to 35 feet, $26 a night, no hookups, seasonal dump. The booking is the challenge — reservation-only during the peak season, released on a 6-month rolling window at 7 a.m. Pacific, with weekend sites gone in under two minutes. Ohanapecosh's ongoing closure pushes all Rainier RV demand here and to White River.
Saltwater State Park
The shoreline state park 20 miles south in Des Moines: no hookups, rigs to 40 feet at $37 on a 9-month window, with a $10 dump and potable water. The guide notes it sits under the Sea-Tac approach path — the honest trade for the only state-park camping this close to the city.
Coming to Seattle? Tell us the nights.
Owners in Washington can submit listings for review. Give us the window you want — you get one email the day a rig covers it, and nothing else.
Frequently asked about RV rentals in Seattle
Can a motorhome park overnight on Seattle streets?
Effectively no: SMC 11.72.070 bans vehicles wider than 80 inches from non-industrial streets between midnight and 6 a.m., which sweeps in virtually every Class A, Class C, and fifth-wheel. Legal overnight blocks are limited to the Ballard, Interbay, SoDo, and Georgetown industrial zones, the 72-hour blockface rule applies even there, and recovery from a Lincoln Towing impound runs $400-650.
How do I get a campsite at Mount Rainier or Olympic?
By treating the release windows as appointments. Cougar Rock: 6-month rolling window, 7 a.m. Pacific, weekend sites gone in under two minutes. Kalaloch: staggered releases — A/B loops 6 months out, C/D two weeks, E/F four days — for its mid-May-to-late-September season, and most sites cap at 21 feet of RV length. Book the parks first, the rig second.
What do Washington ferries cost with an RV?
WSDOT classifies anything 22 feet or longer — including tow length — as oversize, with fares charged by length bracket above that line. Rigs that also exceed height or weight limits need an Oversized/Overweight Vehicle Travel form emailed to WSDOT three business days before sailing. Measure the full rig, bike racks and hitch included, before booking a crossing.
Around Seattle
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What it costs, without the drip
Motorhomes on PickRV list from $89 to $450 per night, plus one 10% service fee at checkout, with a full rental refund if you cancel at least 48 hours before pickup. Seattle-area sites run $26-89 — the mountain campgrounds are the cheap nights and the metro hookup parks the dear ones — and ferry crossings add length-based fares for anything 22 feet and over.
What counts as RVs on PickRV
A motorhome is the RV you drive yourself: engine, living space, and bed in one vehicle, with no separate tow truck needed. PickRV groups them into three classes. Class A coaches are the largest — long, flat-front rigs built for cross-country touring and snowbird routes down to Florida or Arizona. Class C motorhomes sit on a van or truck chassis with an over-cab bunk, which makes them a steady first choice for families heading to national parks like Yellowstone or the Great Smoky Mountains. Class B campervans are compact and easy to park, ideal for couples and solo road trips along the Pacific Coast or the Blue Ridge Parkway. You compare rigs by who hosts them, then book directly. Renters pay one transparent 10% service fee at checkout, with no drip pricing, and a cancellation at least 48 hours before pickup returns the rental charges in full.