Re: 1976 22' Starcraft Islander Rebuild
Had to do some actual work today, so just watched the vids....
All that sounded good & well thought out: for the battery location, seat boxes, fish well/hatch & the bulkhead/cabin doors.
I'm sure that having the bulkhead structure removable for re-varnishing would be worthwhile, & I don't remember the time frame you mentioned (8,9-10 years down the road...that's close, correct??), I'm not sure I'd spend a lot of time, effort, and materials (even at bottom dollar, recycling old, busted, basically free stuff (ladder), bottom-feeder prices) for something I expect to do once every 7+ years, give or take. Esp since you also mentioned sealing them up w/ epoxy first, followed by varnish. And an extra helping of I don't think I would, if your planning to fit a door for the cabin area on those removable bulkhead panels, no matter how securely fastened. Even epoxy sealed wood can be susceptible to expansion & contraction with changes in humidity.
You mentioned Fir in the vids too, is that the recycled Fir from the bleachers? On the Bulkheads? Vertical tongue & groove, or better yet find someone w/ a molding/planer & run them into beadboard tongue & groove paneling, with a 4-6" wide face. That look, I'll really like. Old growth, honey colored from age, tight grained Fir is some of my favorite wood. Esp w/ some nice epoxy & varnish! Yep, I like that a LOT!
But this ^^^ is of course why you post it so far ahead of when you need to decide. Mix some of this, w/ some of that, add your thoughts & here we be w/ that motor in this Islander that fits you.....It's all good, & I look forward to seeing the removable panels if/when you go that way.