There are a lot of RV spaces for rent in the Foothills by individuals. The lots are large enough for 2 maybe 3 RV's. The owner generally stays on one, rents the other. Some will have a casita with a washer and dryer. Rent starts about $275 to $350. depending if utilities are included.
Find them on Craigslist. Google the area in satellite view and you can get the layout out the area. Most all lots will have a wall around them. Real private.