Thanks a lot guys. Well you were right about there not being a "small leak."
I took off the AC, which still works fine, so I'm not sure about replacing it Tex. It wasn't that hard to get out, so I'm ok replacing down the line if necessary. But when I took out the ceiling, water was pouring out of the soaked OSB and insulation. Two of the ceiling joists are rotted beyond repair as well. See link for photos and I took a video as well:
1975 Coachmen Cadet XL - YouTube
My big question is on the roof. I think I may have another "small leak" by the skylight in the back, but the ceiling isn't noticeably soft like it was by the AC, I just can see some of the wallpaper on the ceiling that is coming up.
I'm thinking it may just be easier to replace the whole metal roof rather than patching in places. Anyone have thoughts on this or know difficulty level? I figured this would be the best way to make sure I have a good roof, insulation and structure. Also, where to buy a metal roof for this? Old one looks like strips of 36" by 8' galvanized metal.
Beap, I like the luan idea, but not so much the ceiling texture, is this like popcorn ceiling?
Thanks for all the help, I'm thrilled to have found this forum!