Durfun,
I registered from an RV park. All you need is a rent receipt and something mailed to you at that address, library card, or phone bill, etc. You don't have to own property there. Think of all the people renting apartments.
You can get a drivers license, and register your vehicles at the same time. Good luck.
onezman
http://onezman.tripod.com/yourrvhaulercom