The snow pack and the plowing is the real issue in my opinion George. Much of the rock and tree fall across the road is caused by avalanche and then buried under the snow which can then can damage machinery if they do not plow with caution. So rock fall and trees slow the plowing operation down, especially when hidden under snow, but otherwise wouldn't have a major impact on clearing the road as they are equipped to deal with it. I would think less snow would equal even less debris than normal as even wind damaged tree's would not necessarily be 'carried' to the road by the snow pack. Clearing the road of debris and repairing damage is the 'norm' but the snow depth is the major factor in how quick they can get it done.
Anyway it was a bit 'tongue in cheek' when I said it, as plowing is more than likely going to have to happen.
Dave.