We are also considering buying a RV Lot in a RV Resort. The sales person explained the county code as one cannot occupy the site for more than 180 consecutive days. And the RV cannot be on a permanent foundation, licensed at all times, and cannot have a permanent sewer connection. I asked about mail and she suggested the UPS store just down the road.
This resort is set up that the lots are titled like condos, not deeded. Now that being said, I will check out the county codes for myself, as I have been lied to before!
Peace
Bruce