I have a 16' casita
and i took out the divider and then installed a slide out tray with fold down legs in the center aisle the distance of the side dinette cushion and then sleep longways and it is now way roomier for two ...... in the morning just slide it back under...... a quicker and easier way is to just cut a 24"x24" board and velcro it to the side dinette with two screw in legs on the furnace
side...... both involve taking out the divider...... or if you want a larger side dinette bed you can just add a piece of plywood w/velcro and add screw in legs on the outside section.... I switch between the two depending on what i need. the rear bed mod involves using a 3/4" piece of plywood in place of the rear dinette.
All three variations shown and side dinette table stays in the up position for either of the rear bed mods