Not sure if modification is something you would consider but people have used added an extension to use the bed that runs across the back of a
Scamp as a lengthwise bed. Sort of an add on table that sits in front of the kitchen/closet that allows one to have a longer bed.
Front bunks will work for kids, at least until they are old enough to demand a tent outside the camper (they get independence you get privacy win/win)
Might use the site search see if I can find any of those. Being 6'1" means I just barely fit the bed length on our pre-fire
scamp, so I read those threads with interest but failed to bookmark them. Barely fits means I fit so it was not a priority. But only because the pillow creates a small angle that keeps me from being a straight line across bed.