Snow falls don't last forever. Pull off the road during snow storms. WAIT until roads are cleared and/or salted and get back on the road.
I'm from Wisconsin and all the hoopla about snow storms and driving is ridiculous. Wait till the plows get out there and clear the road. When the sun comes up the roads are dry as a bone.
There really is NO reason to ever drive during a snow storm with any vehicle and most certainly not with an RV. When all you have to do is wait for the plows to go thru, THEN get back on the road.