My 'C' came with a ladder, but I've never used it. FT bed in the rear. I actually removed the lousy mattress in the overhead and lined the area that I could reach from the floor with rolls of the no slip shelf liner stuff. I bought some "make it yourself" boxes from an office supply store. They're cheap, and you can mark the contents with a magic marker. Nothing heavy, but its a good way to keep things that you don't need that often or things small enough to get lost, in easy reach without taking up room in the cabinets.
I never quite understood my ladder. I don't know anybody that goes to bed with their shoes on, and the ladder rails are hard on bare feet.