I’ve camped here multiple times, sometimes with multiple RVs in a group, it’s very private with wide vistas.
Sometimes you can go days without a single car passing by, and there are a lot of spots to just camp since it is all completely level. There are a lot of insects, birds, and the occasional cow and deer.
To swim in the lake this area connects to Stine Cove campground - via a very soft sandy road - which is also free, has a vault toilet, but is shaded by mountains and less private.
There’s a $12 dump station with potable water at Camp 9 and one at Old Isabella Recreation Site.
T-mobile was very slow but Verizon had a good connection.
Heads up that the lake is MUCH lower than anything you see on satellite view, from Stine Cove I still had to walk 30min before getting to the shore.