These are the most easy to locate in any area as long as you have a search engine or campground directory. A campground directory is a large book full of every campsite in a specific area that includes the price, location, amenities and general overview of each campground. Most private and public campgrounds will offer some range of amenities which could include anything from primitive toilets to full hookups, wifi, showers, and even laundry.
Make sure to read as much as you can about a campground and look for the amenities to determine if it is a spot you will want to stay in. Also look for the size limitations for RVs; some campgrounds only accommodate smaller RVs.