Great topic. The factory mattress is plain junk. What I did on my 180 was replace the worthless factory mattress with a full size futon mattress. This allows you to buy a full size mattress cover and sheets and you don't have to spend ridiculous money for the short queen sheets. With the slightly smaller futon mattress on top, you get 3 to 5 extra inches of space along the long front wall and more room between the head and foot side walls. Now I can make the bed with ease.
I bought a 10 inch thick futon for $200 bucks and whats nice about it, is that it folds nicely when you access the pump or valves underneath the platform.
Now I sleep so much better. If the small 3-5 inch gap bugs the person next to the front wall, just place a few rolled up towels or some sponge in the gap. I roll up some beach towels and place my 38 special there.