I see you mentioned 3/8" plywood. Did you really mean that? Have you looked at the 3/8" you plan to use? There isn't much to such thin plywood and it is rarely flat and can be hard to fasten without damage. I'm not sure I follow its intended use.
Overall, sounds like a blast. Put in more outlets than you think and more light than you think and access, access, access. We won't think of everything but we'll try!!