No RVs or cars in the North 40, which is GA camping. You can camp next to your plane in a tent though, which is what we do. My friend does some reporting work for the local chapter so he gets press credentials with a parking pass, which we use to park the vehicle in one of the nearby lots, usually the Warbirds lot.
Scholler is a HUGE place. They have shuttles that pick people up and take them to the front gate as well. But bring good walking shoes. Lots of people on bicycles as well.