I definitely would look for a storage facility that is covered, if only to get the relentless sun off your rig.
If you were building a storage area, I'd consider building an aluminum carport or pole barn, put solar panels on top with a good converter and some maintenance free batteries, and have the electricity obtained from the panels power some fans, just to keep the air blowing. Adding an inverter doesn't hurt either for keeping the batteries topped off... but I'd recommend a Battery Minder or other trickle charger so there is far less chance the batteries will be boiled dry.