This is a Washington State Department of Fish and Wildlife fishing access site. It is free with a Washington State Discovery Pass for $30/year. This annual pass will also gain you admission to state parks. There are several boat launch sites here and a number of those Sani Cans. The area is spread out over open land with smooth rocks. It can be a bit bumpy if hauling a trailer unless you stick to the smooth rock roads. No shade except along the shore.
For a free site, it has its good points: easy access to highway 24/243 which will bring you to I-90, quiet, wide open space, near the Vernita Bridge Rest Area for free tank dump site. If you arrive on the last weekend of October, there is a huge king salmon fishing derby with about 100 entrants so you will have company. But, it is usually quiet midweek in the spring and fall. It may be busier in the summer midweek as there are lots of fishing enthusiast ps and boaters who live close by in the Tri Cities area.
If you need a quiet place for one night or are hauling a river fishing boat, this is a good place to stay.