I would agree @NHcamper that in your area with all the snow you have received it's likely best to remove some of it. We have been lucky in my parts, most of the big storms have missed us so I'm just going to leave things alone at this time.
Still it's hard to ignore the fact dealerships and RV Storage places probably don't do anything. Besides, isn't insurance there just for this type of scenario should the roof not be able to support the weight?
Wayne, Kim, Mallory & Abby the Dog
2013 - Jayco Jayfeather - X20E
2012 - Toyota Tacoma DBLCB Sr5 with towing package
Equalizer 10k WD, Prodigy P3 Controller, TST TPMS
2012 - Jayco Sport 10 Popup - Traded