Quick update, found some foam cushion stuff in the attic and cut it to size. approx 22"X33".
Put it on the slide out and made the wife come out and try it.
By golly it just might work out nicely. Plenty of room for legs and the top part feels almost like our old queen.
The true test will be next week.
I figure the porta pot will sit in front of the door. In the AM when I get up to make coffee she can just slide around the way we used to sleep and I can slide in the bed mod.