We get a lot of snow here so I throw a small canvas over the AC unit and tie a rope around the bottom to 'tuck it in' and hold it in place. Just the AC.
Also, I leave the trailer front high to help drain off snow water.
Don't forget the mouse poison.
DRINK COFFEE--do stupid things faster and with more energy ! Rockwood 5th wheel, Signature Untralite, 8244S
Tow Vehicle: Ram 3500 6.4 litre Hemi.