Any time I've tried to price 2 cabins vs. one for 4 adults, the 2 cabins option is WAY more expensive. So, we always squish into one cabin and it's fine. We do find that the upper bunk is very cramped length wise. There's like a little bumper thing at the foot of the bed, and if you're tallish, your feet with crash into it. Both of DD's are 5'7" and they are very uncomfortable up there. The murphy bed, on the other hand, seems to be a little roomier and doesn't have the bumper thing at the foot. So, we book those rooms now.