My Arizona (& New Mexico) experience is that if sited in full summer sun, 2 a/c units in a large RV can barely cope. Maybe 80 F inside, and that's with awning & toppers deployed. A bit of shade, though, is vastly better and as the sun goes down, the interior temps improve a lot.
As Kirk described, there are a lot of factors to consider, so I don't think a simple Yes or No answer will be accurate. Or even helpful.