Dinette/Bed - Event Date: 26 Apr 2017

We had that same problem with shifting cushions, so we ordered a duplicate of the main cushion cover from Forest River, then went to a local foam shop and got foam cut to fit.  I had some 3/4" plywood paneling that I cut down to match the size of the cushion and it stores under the original cushion.  I considered hinging it but decided that sliding it in or out as needed would be easier. 

Next step was to discard those goofy corner cushions and use the new one for the back cushion.  The shorter cushions store nicely at the ends for travel.  The plywood rests on those hassocks, giving a small difference in height between the two cushions when converted to a bed.  It wasn't real bothersome but we still cut a couple of pieces of 1x10 to about 8" to serve as spacers.  So far, we haven't had any problem with the two cushions separating, but we have been using pieces of rubbery expanded shelf liner, just in case.

Finally, that quirky table went to storage with the corner cushions and we replaced it with two folding TV tables.  They are a LOT easier to take outside than the original table too. 

When set up for sitting and dining, that new cushion does cut down on the view outside, which is pretty limited anyway, but we like the versatility and we don't spend lots of time inside looking out.  Finally, the resulting setup is really easy to change either way as needed. 

Please let me know when a satisfactory solution is reached. What do you mean by ottoman?

Get a piece of foam the length of the gap between the ottomans and the width of the ottomans' length. Then get an air mattress (full or twin size) and put on top of that. We did that for a while. The air mattress fit nicely in the ottoman storage next to the bed once deflated and folded up.