If it gets down to an A/C I might recommend a smaller unit like the Coleman 7 or 9000 Polar Cub. They are a lot quieter than the big boys and no bigger than the bedroom is they are big enough. Lots of folks use them in truck campers.Thanks guys for the info.. I'm not a big fan of the second A/C I'm a very light sleeper and the units usually keep me awake...