[sourdough]

I don't know about other parts of the country but throughout our part of the country literally every city has "free" RV accommodations, usually within a city park. One I used to stay at was just off a highway coming into the town - just pull in and hook up (all I'm aware of had water and electric - no charge). I'm not sure how you find out about those as I've never seen them advertised. If you had a specific spot you wanted to land you might call the chamber of commerce.