I remember at Cannon (the source of my 29 below day that I mentioned earlier in this thread) they had employees at the lodge doors and they wouldn't let you out to ride the lifts if any skin was showing. I guess they couldn't actually prevent you from skiing, but it seemed like a smart move on their part.
I belong to a night race league at a small hill (about 250 vertical) here in eastern Massachusetts. I guess Nashoba Valley is about the size of some mid-western hills? At any rate, we get some pretty chilly nights; low single digits above or below. With the 20 second runs down and the slow lift back up -- I can never get enough movement going to actually feel warm. Those nights are "thermometer warmer", but actually feel colder in a way than the "stupid cold" temps the mountains in northern New England experience. At least when you have 2,000 vertical to work with you can sort-of feel warm as you get back on the lift.
You Minnesota types posting these ridiculous cold temps that you experience -- you've got my respect.