Easiest way - you could build a removable riser that is even with the step up to the dinette which could be used make a bed with the leg room underneath the dinette table in bed mode with a little room left for sliding by. This could also double as a step up into the trailer (I would say step stool for inside but I don't think anyone really needs that in a
Scamp with the low ceiling. Have also seen a small bunk build under either side window for a smaller child or a complete bunk above the dinette if you don't have an overhead cabinet