mpoulsen, Make sure at least the half bath is accessible with the slides in for those in route duties.
One advantage of the opposing slides that I like if we stop at a rest area or pullout along the road is that we can put out a slide on one side to make access to to kitchen a little better. Also real handy while I park at the house to load/unload.
As far as the drop-down bunk our Bounder has basic wrestling mat for a mattress. The oldest grandson claimed the bunk till he got about 14. We had a mattress topper laying around and we put it on it. It made it tolerable. I got kicked out of bed one night by the granddaughter and I slept on it, I could still move in the AM.