I live south of Tucson so not as hot as Yuma. No way can I afford the indoor storage. Maybe if I was in the income bracket to have a 100,000 + rig I could put out the dollars, so my lowly trailer and fifth wheel (still for sale) sits in the open. In a year and a half, so far, I see no ill effects. The main thing I do see is graphics fading and that kind of problem. All I know is that I see 1000's of rigs in the open so I can't believe they are all incurring huge amounts of damage. And all the rigs at dealers lots sit in the open...