I camped alot of places this summer, Rosehip was by far the cleanest. There is some road noise but it was infrequent and really nothing more than white noise.
It was Saturday on a July weekend, more camp spots empty than full. Each spot seemed rather well placed with a buffer of wilderness with some paths between camp sites. Some sites are double for more than one vehicle, but I'd say you could easily fit two vehicles at one site.
Plenty of flat forest ground for tents. A deep fire pit, my site could easily have held three maybe four bundles.
There was a kiosk credit card at the pull over before entering the park and a cash envelope station in the park. No site host when I camped.
Hope you like it as I did, toodles.