http://camping.about.com/cs/campgrounds/��
Your best bet is to visit a camping store, or RV dealer and purchase a woodhalls campground guide. This is a fairly large book with listings in all 50 states, plus Mexico and Canada.They list all sorts of area grounds with prices, what each has for entertainment, swimming, hours of operation and a pretty good description of the particular camp ground, and directions to each. Camper world also sells about the same book except with their own name.These listings include both private and state camping areas.