Not private for tent camping
I have been to Raccoon Creek many times as it is one of the closest camping places to the Pittsburgh metro area. The park it self is large, has over 40 miles of trails, a fantastic backpacking loop setup for beginners, and a nice lake for swimming, fishing, ect. I would give the park as a whole a 5/5 but for tent camping the campground is mediocre. It is a really large campground with lots of adjoining loops. We stayed in the tent loop at the back of the campground. The area is not wooded at all and most sites look right into the sites next to them. If you are like me and crave privacy, avoid. The bathroom was rather dirty also. There is a trail that leads down from the tent loop to the beach which is cool but very very steep (not for too young or old). Overall, if you are looking to stay in a camp in this park I'd suggest doing the backpacking loop instead. Grab your permit at the park office, park at the heritage trail lot in the southern end of the park and hike to the Pioneer shelter. Sites 4 and 5 are amazing. Note though that the Pioneer site does not have water so you will need to filter water from a stream on the way, though there are many opportunities. The Sioux site is overgrown and is not worth backpacking to, though it does have a water pump and is close to the park office.