Went up the ladder and now I know why the roof puddles over after a rain. Theres a lip of self leveling sealant where they sealed the roof aluminum sheet to the aluminum sides.
I'm planning to run a 6" wide strip of grey Eternabond around the perimeter, I know this is not going to help with the roof holding water but it will help in sealing it up. I learned from my other trailer to put a lean on the trailer during long storage.
We went to our local dealer and priced a "cover" like your, but our measurements were 42x18x13 (my side walls to the top of AC is around 13ft) and he quoted us 4000.00 installed. I think that is on the high side. Still searching around on the east coast to see if I can buy the materials and erect it my self.
I leave mine about 1 degree nose high, drains most of it off. As long as refrig isn't running whats the harm?
You could even run the refer that is not enough of an angle to cause a problem. My driveway sloops back way more then that. I always hook-up the night before and leave the refer on, never had a problem yet. You really got to be pretty far off level to have a problem....
Rockwood #8289 WS 2012
F250 6.0 / Husky 16k
With 4 point leveling system