Hey Doc, it's nice reading your posts! I have a few thoughts and questions that I thought I'd out.
First, are you still having backup lights glowing issues? If so, check the ground on your wiring harnesses. If your camper is plugged in through the trailer wiring, I will guarantee that you have a bad ground on one side or the other. For some reason, the backup lights become the ground path vs. the other lights. (Assuming no battery in the camper, so it runs off the truck...)
Second, I have a '94 Ute with the 2pc rear door like you have, and mine could use new soft walls too. I was also thinking about going to a traditional door with screen, and then just having new canvas made by Bear Creek. What did Hallmark say they would do for canvas if you replaced the door with a short door? Any rough pricing you could pass along?
My camper has the original Hallmark roof, which is non-aluminum, non-fiberglass. It's not very light, so I think it's wood based. Mine also bows down in the middle where there isn't any support, and it sags at the front when you put it up, though it seems like they all do that. If you have the fiberglass roof, you are lucky indeed!!
Keep posting!
Chris