We were talking about this in another thread, but again, I thought I'd start a separate one so the discussion doesn't get buried. I'd love to see what everyone else has done about this. I like Mike's piano hinge idea. The separate boards sort of hinge themselves, but occasionally that far edge can lift over what it's braced against and get a little offset. A hinge would be great.
As far as supporting the floor boards, I just cut two pieces of 1x2 to about 18". Works great. I'm thinking of adding a loop of nylon webbing underneath close to the edge so that when closed it'll stick up between the edge of the floor board and the door. That'll give something easy to grab and lift with. I'll keep the 1x2s underneath in the floor storage space. See how nicely the solar panels fit? I think it's a safe storage spot for them. Also, you can see how my floor storage doesn't extend the full length in the 6x10. My dealer didn't like how the floor board wasn't supported at the foot end (where you can see the handle). He added the removable 2x4 with the handle on it. Pretty nifty and an example of how my dealer really went the extra mile.