A nice state park is about as commercial and dense as we like to get unless we're doing a non-camping vacation but just using the camper as our hotel. Forest Service campgrounds are usually pretty spread out especially the more remote ones, and the remote ones tend to be pretty empty too. Primitive in a nice area is generally our favorite. Your only neighbors are the ones you bring with you, no worries about the kids being too loud or doing a little target shooting or whatever, collecting firewood in large volumes is usually easier, etc.