We have a Scamp
13 and we are four (girls ages 10 and 13). Sleeping arrangements are… well, cozy, but comfortable. My wife and I find the standard 45" dinette bed tight for the two of us, so we rearranged: my wife shares the dinette bed with our younger, sleeping head-to-toe. I share the front bunks with the older (who is quite petite, or we'd be up against the 120 pound weight
limit of the upper bunk). None of us are large or tall, so it works for us. If you do decide on a Scamp
, you might want to consider the no-cost optional 54" dinette bed.
Last I checked new Casita
Patriots are only available with the front bath layout, so they only sleep two. You'll have to go back a few years to find one with the bunks. Casitas only have about 5'10" of interior headroom (vs. 6'2" for late model Scamps).
The Happier Camper HC1 looks really interesting. It lacks a bunk option, so you might have to give up an inside galley to create sleeping space for four. The modular interior gives you a lot of flexibility.
I hope you'll be able to find a way to get a first-hand look. If you call Scamp
they will try to set up a demo with a current owner in your area. Not sure how you could get a look at a Happier Camper, but I'd give them a call.