I had a roof leak over the winter. I found two spots where water came in. I took off the old caulk and recaulked it. I have not had any water in the camper since. However, this has been happening ...
Drying out the rig when you have a leak makes sense to me - as others have said it's likely your going to have to replace the interior lining to make it look new. I believe that interior antennae crankshaft shown in the pic should be easy to remove - might give you a chance to see whats causing the wrinkles.