I have driven my class A motor home in snowy conditions twice and will not do it again ever.
I am not a stranger to snow and ice. I lived in NH for 18 years and had a 112 round trip commute to the Boston area each day.
The problem I had with my motor home was ice build up on the wiper blades that was bad enough to keep them from clearing the windshield.
I had the heater on full blast defrost and the two overhead fans going and just could not get the ice to stop building up.
I was on two lane roads with narrow shoulders both times so could not easily pull over and clear the blades. The snow was heavy enough that traffic behind me would have trouble seeing me in time to stop if they were going a little too fast and some were.
When it got the point where I just couldn't see well enough to keep driving I pulled over as far I safely could, put the four way flashers on, jumped out, ran around to the front, cleared the blades and ran back and started up again.
My pucker factor was extremely high.