If you are still looking in the fall:
Very Inexpensive Year-Around Camping Near Tuscon, RV Site Less Than The Price of Storage
3:18 Season is from the first of November to the end of April.
In season electricity is from 9am to 9pm.
Off-season electricity is one day per week.
12:35 Nice shop is available for use by tenants.
http://www.caballolocoranch.com/ 14475 Tr Ranch Rd, Tucson, AZ 85736
19 miles, 31 min, to Robles Junction/Three Points (general store, Ace hardware)
41 miles, 62 min, to HomeDepot, 1155 W Irvington Rd, Tucson, AZ