As one of the closest state parks to Portland and in the beautiful Columbia River Gorge, Ainsworth can get busy during the summer months, but sometimes you can get a reservation during the week. I like to come in the off season.
There 40 full hook-up sites, 6 walk-in tent sites and a hiker/biker campground with no reservations required. The campground itself unremarkable, with a bathroom/shower house, dump station and play ground, but it is a great jumping off point for exploring all things Columbia River Gorge.
Dump station and water available