My brother just bought a used land yacht, a 36' Tiffin Open Road. He needs that big thing as his son is quadraplegic and is confined to a wheel chair, and has the World's Best Service Dog ever.
HE told me about this 'association' called Harvest Host. From what I can gather from the website, it's a private club where members allow RV'ers to stay at their place for a night. The place can be a museum, a winery, a farm, a working ranch, or just someone's back pasture. The requirement is that your unit be completely self contained, meaning no tents, and they don't provide things like power, water or sewer, no dump station, etc.
They're adamant about that aspect. If you have pets you must check with the host before hand, some places don't allow dogs. (and if you wonder why...most farms and ranchers have dogs that object very much to some strange dog pee'ing on their turf).
They are all over the map, as far as I could see, and they also encourage people to join if you have the room or the venue. For instance, we could, ostensibly, join as a 'host' because we have plenty of room for an RV.
"Units' such as our Casita, etc are allowed, although it does seem geared towards the big road boats like the one my brother bought.
Anyone have any experience with the association? I'm trying to figure out if it's something we might be interested in.