We have an '86 13' boler
and we've been sleeping that way for about 7 years. We have one small dog, and a cat who sleep on the bed so we had to make it bigger. During the day our slide-out slips back under the bed on "c" channels and we pop the little extension mattress up on the bed so the furbabies can sit up there looking out the window. Then we have our full floor space back for during the day. We converted our couch/bunk beds at the front into 3-way couch/bunkbeds/table and seating for two at the same time so the big dinette stays down as a bed. We topped that new bed off with memory foam and it's actually more confortable than our "in the house" bed.
Sleeping 90 degrees from normal makes for lots of room where our bodies are and who cares about our feet? The 36" width there works just fine.
I posted pics and instructions on how we did it a couple of years ago but have no idea where to look for them now.
We just finished putting two 5/8" square aluminum tubes curved to the proper shape, on the inside of our roof to prop it back up after an over-load of ice and snow and the addition of a Fantastic Fan made it sag over 2". These new additions are working really well and the roof is back to it's original height. We installed them on the inside right over the carpet and you really don't even notice them.
Lots of luck with your travels.