Like mentioned above...do all the common winterizing with water system and batteries. (I take my batteries out and store in garage).
Lots of years and lots of different RV's and no issues with snow/ice loads. Make sure the roof and Dicor are in good shape, keep slides closed and you will be ok.
Some put covers over AC, I never have but can't see it being a bad idea. I do cover the tires to keep sun off.
Just sucks to have to put the camper away for 6-7 month..oh well..the price we pay for living in Gods country