Blackwoods campground in Maine (Arcadia National Park)

I'm not sure I understand what you're asking. They have sites that are 35 feet long, and some overhead something or other that's 11 feet off the ground.

My class C motorhome, for one example, is under 11 feet tall but just about exactly 32 feet bumper to bumper; with the bike rack on the back, I'd be pretty close to 35 feet long. Most travel trailers (not fifth wheels) are also comparatively low even if they are lengthy models.