Another vote for watch the weather and RVs DO NOT HEAT UP LIKE CARS!
Car people don't understand this and I often see them express concern when they see us take the dog out to pee, put him back in the RV and then walk away.
I explain that he has roof vents with thermostats and the inside won't get any hotter than the outside air. As long as he would be comfortable outside, he can be comfortable inside.
In the heat of summer I do occasionally leave the generator running and the A/C on. If it quits, the temp will still be reasonable inside as long as we're not gone for too long. The RV won't go from 70 (A/C running) to 95 (if 95 is the outside temp) instantly.
My Class C has a white roof, heavily tinted windows, window blinds, and an overhang shading the windshield. It just does not heat up like a car. Especially with the roof vent fans running.
