I have been thinking "outside the box" once again and have had a "eureka" moment. Most people seem to put the head of the bed at the front of the trailer. As most trailers have a curve there this may affect one's ability to have nice headroom when sitting up. If you have the head against the rear bulkhead (assuming your galley doesn't intrude into the sleeping area) you have nearly the full height of the tear to work with. In addition, baring suicide doors, It seems to me that the opening of the door will be a more natural motion (pushing the door open rather than trying to fold the door behind you) making egress a bit easier.
Also, putting the usual shelves over the area of the feet will now be more forward in the trailer and perhaps provide a bit better weight distribution. As I intend to only store clothes and sleeping items in these shelves, the weight won't be significant it will be more "balanced". Also if I mount an air conditioner in the "foretriange" it will be easy to plumb the air intake/exhaust over the feet which I think is more desirable than having it right near your head. Any thoughts?