Simple, cheap air conditioner. You put ice in it, then turn on the fan... And you get cool air for your tent! (Don't forget a power source). You just have to keep loading it with ice! Oh, and stop grabbing the ice for your margaritas! #camping
Portable Air Conditioner for Camper - Originally manufactured for dog houses. Most are mounting to the tong and are commonly used on teardrops. They are currently developing units for larger trailers. A little price.