I visited this campground July 3, 2023 while inspecting the USFS sites between Prospect and Union Gap.

It is right on a large river and is a gravel and dirt road.  Nice spacing between sites, but generally open.  Opposite the entrance to the campground is a day use area populated with a lot of people fishing, relaxing, and tubing.  I didn't see any mosquitoes.  There was no water, nor any dump site.