My in-laws used to live at the top.. There were a couple occassions when we were visiting and just sat tight and waited out a storm. Not worth it. I don't care what you drive. If you do have to go down those hills (400 North is notorious), you drive super slow and pump your brakes constantly. The worry is some moron behind you who loses control at 35 mph. That is why I'd wait. There were always wrecks.
I've often wondered how the people up at Suncrest fare with those hills into Draper and Lehi? Anybody familiar with how that is in a blizzard?