Quiet primitive campsites on the lower Snake River - at least, in late November, when there was only one other campsite in use. I suspect it's a bit busier in the warmer weather.

Clean, frequently checked toilet. No water or power. Tables and fire rings at each site.

The Little Goose Dam entry point is open in the daytime from 7:30 to 4:30. Signs state that crossing is only open once an hour on the half hour, but the security guard opened up right when we got there both entering and leaving. There are also campsites along the river before the Riparia campground entry. Easy gravel road into the campground.

Open all year. No wood fires allowed from June 10 through October 10.

https://www.nww.usace.army.mil/Missions/Recreation/Lower-Monumental-Dam-Lake-West/Riparia/

Nice Washington Department of Fish and Wildlife campground with a dirt boat ramp, seems to serve mostly fishermen. Some sites are right next to the Klickitat River. Some have easy access for larger rigs and space for boat trailers. The campground is right next to SR 142, but it's not really a very busy highway. The Klickitat Trail for mountain biking and hiking is nearby.

We stayed for two nights mid-week in September. The river sites are in sight of each other but not too tightly packed. It did seem that some of those sites were occupied by some long-term residents, although you're not supposed to occupy spots for more than 14 days out of 30. One site ran their generator constantly, so we set up on the other side of the old Icehouse structure right next to the river, where the river noise covered up the generator noise. We had a quiet pleasant stay.