what will happen???

We left our TT in AZ one summer, I won't say it "ruined" it, but it sure as heck roughed it up. We took all the precautions cleaned it, waxed it, covered the windows, covered the tires, had the neighbors check on it. The sun was BRUTAL on it. All of the decals were severely degraded and the filon was dull and chalky. The rubber roof faired the best but needed complete reseal.
Never again will I leave our RV in AZ unprotected . Now, unless we are using it, it is parked in an enclosed shop.
The RV never really fully recovered from that one summer in the AZ sun.