Fixing water damage on the old Dodge (pics)

I'm going to try building a whole new wall for it. Not quite sure how I'll go about it yet... Be nice to have a large pad of concrete to build it on, but no dice. At this point I'm thinking of building a big frame work to support the first piece of paneling, then I can start building the frame on top and eventually put the outer panel on. Originally they just lay the frame pieces out and staple between them to stick them together. Once the staples rust away the wall gets pretty loose. I used some galvanized corner brackets and epoxy covered screws in my camper rebuild 2 years ago with some success. I just couldn't use them in tight spaces very well. I'll probably just glue them down with some const. adhesive first then go from there with some kind of fasteners where I can. I'd like this thing to be as strong and light as I can make it.

Yeah, I had a few moments of doubt last night, but I do enjoy a challenge. We'll see what happens... I hope to get done with tear down in the next week.