I've had two - a small one, and the huge one I have now. My .02,
go with a small one, possible even one of those where the top lets down
sort of like a pop-up camper. The one I have, though not as heavy as some,
at 3100 lbs, is one heck of a load on a truck. Not only heavy, top-heavy
and wide - catches a LOT of air going down the road. If you can manage
to only run 50-55 mph, it is not too bad, but try to run 70 on the big road,
and it is a struggle, and burns a lot of fuel. Also, due to the way the jacks
are made on mine, it is not designed to be occupied when off the truck.
A big drawback there. Have to unplug and stow everything to go launch or
load a boat, a big hassle if you are at a site where you can't leave your boat
in the water. The only thing I really gained going to the larger one is a
bathroom, but it is sort of a joke - so tiny it is not worth it. It is a Coachmen
brand, it is my understanding that they no longer make slide-in campers.