I had posted the most recent comments on the ACBOOT--I had put the original thread in my favs(glad I did because it disappeared not long after) until I could buy it and for us this was the way to go====For those who posted about the free standing AC units be aware that these are not true AC units,they are evaporative coolers and in doing mounds of research found that these units don't offer a lot in the cooling area--generally they offer only a 10 to 12 degree change in temperature!!
So if it was 100 in your space it would only knock the temperature down to 88/90!!!
They do make tent fans but we found with our old tent that this just didn't do anything---Maybe for the smaller 2/3 person tent it would be ok but for anything bigger they are pretty much ineffective,bigger fans would be better for cooling a bigger area but if each person had one you could run into not enough outlets for all the fans plus other items you would need to run off electricity.