Has anyone ever cut out a section of their trailer's under belly to gain access to plumbing, etc.? If so, how did you reattach it? The covering on my trailer is a sheet of flexible rubber.
A lot of people just cut 3 sides and leave the 4th side as a hinge. Swing the panel out of the way, do your repair, then use Gorilla tape to fix it back in place. FWIW, I've never heard of Gorilla tape coming lose =if= the surface is properly cleaned first.
Later: Make =sure= to leave the hinge to the front of the trailer, so if it =does= come loose, it'll just blow back up. Also, check it from time to time.