Where to take an RV from Seattle

Two things decide where a Seattle rental can go. Length decides which campground will admit it, and the median listing here is 22 feet against an Olympic standard site of 21 feet. Water decides the rest: three of these five destinations need a ferry, and the crossing prices by size.

• Olympic National Park

  Filter by length before you filter by price or class. The median Seattle rental does not fit the standard Olympic site, so an unfiltered search puts you in the 53% competing for scarce oversize sites.

  Reached by ferry from $61.00 one way for a tall vehicle under 30 feet. 14 campgrounds with published limits.

• Mount Rainier National Park

  Plan a Mount Rainier trip around your tanks and locate a dump station outside the park before you arrive. Do not assume you can empty on site.

  Reached by road. No crossing, so no height band applies. 4 campgrounds with published limits.

• San Juan Islands

  Price the crossing before the rental on any San Juans trip, and stay longer to amortise it. A two-night San Juans trip spends more on the ferry than on the vehicle.

  Reached by ferry from $256.75 one way for a tall vehicle under 30 feet. 1 campgrounds with published limits.

• Whidbey Island

  If the goal is an island night rather than the San Juans specifically, take Whidbey. The saving funds two extra nights of the median rental.

  Reached by ferry from $46.90 one way for a tall vehicle under 30 feet. 1 campgrounds with published limits.

• North Cascades

  Take the longest rental here, not to the islands. This is the only destination in the set with no ferry and no published length cap, so neither the 7'2" height band nor a campsite limit rules anything out. Confirm the site with the park anyway, because silent is not the same as unlimited.

  Reached by road. No crossing, so no height band applies. 7 campgrounds with published limits.

Campground limits quoted from the National Park Service. Washington State Parks limits are not shown: they are not published on parks.wa.gov and sit inside the reservation system, one park at a time. Measured September 5, 2026.