Thanks for your suggestion of using static cling window film on the outside of the trailer windows before putting a cover over for the winter to help reduced the possibility of scratching the windows. Have you done this? If yes, what state do you live in? I'm curious if our Michigan below freezing and sometimes below 0 degree weather would have a negative impact on the window if I used the static cling. Looking at the picture of your trailer, I'm thinking you might store yours indoors.
Thanks for your input!