We spent only one night here (approx. 45°41'49.5"N 125°44'18.1"W) in a lovely clearing featuring a metal fire ring. Sites are designated, but free for use up to 14 days. Lots of fishing accessible along Cook Creek. Road is dirt/gravel and currently ends about 3.5 miles in due to "flooding damage" which takes the form of several very large boulders blocking the way. Our intention was to go for another 1.5 miles or so, but we were very happy with the site we found. We will definitely return!
Designated dispersal camping is a great idea - no loud neighbors within at least a couple wooded blocks between each site. You get large, open circles of bare ground at Cook Creek, each with a fire ring. The 5 sites are a tad bit off the road… good. The trees, hills and water are all luxurious. There are boulders blocking the road after site 5. You can walk around them, though presumably the road is flooded out, making the other sites unreachable. Would be interesting to explore.