Would it work?
I'm sitting here, my mind going in several different directions about different things and I was considering all of the bunk door leaks. It seems to me that an inflatable seal may be the answer. I'm no design engineer by any stretch but it seems if you closed the door and inflate a tube that goes all the way around it would solve a lot of the problems. Even if the door were not perfectly flat. That and core the doors with something other than wood. It would be a simple design change in the production phase of the camper but after the fact I'm not sure how you would do it. Just an idea and maybe someone with more smarts than me could figure it out.