We are driving from New Orleans to Flagstaff AZ Saturday. We will sleep in the back at a rest stop along Hy 287 Around Quanah,Chillcothe, Childress. The high on Saturday in that area is going to be 100. Last trip it was much, much cooler, so we didn't have to run the motor much to run the AC. This time it looks like there is no way to not run the AC. It will be for 6 hours -about 4 gallons $17 or so. Any ideas on how to cool it without using the AC ? A swamp cooler won't work ;the humidity is too high . Those tiny fan/ice chest coolers won't work. I'm considering bringing lots of ice , putting it in freezer bags ,and placing the bags close to us while we sleep. I even considered hauling a window ac and a 3500 watt generator (too heavy ,too bulky ). Any thoughts? Thanks, Charlie PS -A motel is out ; they are about $80 even in those small worn out looking towns near the panhandle.