I was in our rv yesterday, thought of you, and took the time to look at the bedroom floor.
If you give up one small bottom drawer you can build a platform on the entire floor doing away with the step stool. Then you move that drawer to the front of the platform you built and you have a factory looking drawer that is now about 7 feet deep.
Giving up one drawer, and gaining a place to store umbrellas and fishing poles and rifles and that exhaust thingy that goes on generator exhaust, for comfortable sleep due to a wider selection of mattresses is what I'd do.
It's a couple of 1x6 and a piece of plywood cut to fit. You can even use the existing floor covering to make it match.
(Don't tell my spousal unit or I'll be building this)