Awesome, thanks for all the input guys! Looks like the AC option pulls more power than I thought. The cooler idea looks interesting, but I'd rather not be buying ice all the time. Still might be worth looking into. I'll have to try a fan, and I like the screen with magnet idea, although I'll have to use that on the side windows since I don't have a sunroof. The swamp cooler looks like a great idea as well, and I'll have to tackle that once I settle down somewhere.

Thankfully, I've managed to stay at places or altitudes where the temperatures weren't too high. The worse was back in Iowa and North Dakota, and things should start to be cooling off, although I do have a week or so in Utah yet.

I do have a tent with me as well, although I've only used it recently in Flagstaff.

Thanks again for the input!