Rick & Shannon -- You need to get the leaks
fixed first. Otherwise anything else you do can be compromised or even ruined by the moisture.
I have been chasing a mold/mildew problem. The problem became apparent a year ago when I got bad congestion on a fall
trip south for no specific reason. Turned out to be mold. First under the sink. Then under the vinyl floor covering. Now I have the fridge
out and am replacing the moldy plywood box it was installed in.
I have found several small leaks
around loose rivets and window frames. Any bare wood developed mold. Wood with a good coat of enamel or varnish is OK.
Check out Roger's wire shelving in his photos early in this thread. That is a very elegant idea, simple and entirely practical. It provides a great out-of-the-way place to stuff your bedding during the day that allows it to air out. Much better than stuffing it under the seat compartments.
I put a lot of time into a 'proper' cabinet above the back window complete with mitered door frames. Looks nice, but if I were to do it again . . .
That's what is so good about this forum. Each has opinions and druthers. But there are a lot of ideas presented here that should be considered before casting opinions or druthers into concrete. There is no shame in changing ones mind.