Just getting up and into the overhead bed may be doable with proper ladder and techniques. When the partner toward the front needs to get out of bed in the wee hours, levitating over the sleeping partner and getting down the ladder in the dark is especially risky/painful business if you have any arthritis or other physical problems. One person sleeping in the overhead and the other on the jackknife sofa or dinette cushions may be the best option other than getting a longer rig with rear bedroom. Dogs will find some place to sleep on the floor or captains chair. The "C" is for best compromise.
