Personally I would get the quietest solution WHILE running the air conditioner. That would be the big expensive 3000w or bigger units. A pair of the smaller units running together are as loud as my open frame Champion 3500/4000 with remote start while running the Air. I would never consider running it in a camp ground.
Now if you boondock like us and only use it for the air anyways, it's a nice unit. $425 and I can sit on the couch, push a button and turn on the air.