Ridge Sites 4, 5, 6 is a hike-in campground at Angel Island State Park in Marin County, offering three individual campsites at $30/night with rolling hill terrain and coastal views.

The park is only accessible by public ferry from San Francisco or Tiburon, so check ferry schedules 1-2 weeks before arrival as they change seasonally. Reservations fill up quickly—book up to six months in advance through ReserveCalifornia. com.