I would do Cypress as well. You can be left alone to some extent. There are people there of course, otherwise I'd suggest a private home.
Playalinda is a bit of a pain unless you found an RV park nearby. Quite a little drive from there to anywhere really - Titusville?? Fawlty Towers doesn't help with your RV and is right next to the Peep Show Emporium --- that sealed that joint off our list unfortunately. Sunnier palms near Ft Pierce is very private.
I'D GO CYPRESS COVE and ask em for a lot with some empty spots if there are any to give you space.
Caliente is borderline swinger joint.
.
