Thanks for the suggestion of the toy hauler, but my wife and I only have a couple of bicycles that we may carry on some trips. And I wasn't interested in anything longer or higher than the 177lhs. I think we'll be happy with the 177lhs...at least for a while ;D
Tom--I'm getting a whd for the trailer, I'm not that used to towing since the only thing I've towed since I was a teen is a pop-up which, of course, is way easier than a traditional TT.
As for the ac, I had the dealer turn on the air at the dealership one day when we had looked at one and it just didn't cool that great, it was about 96 that day. Since anywhere we would camp within 300 miles of us the late-spring to early fall temps will be in the mid to upper 90s, or higher, we decided to go for the larger unit in order not limit us to high mountain sites except in the dead of summer.