It can be a challenge to stay warm skiing on these minus 20 degree mornings. Obviously having appropriate gear is key, but I find that dressing fully in the warmth of my home and raising my core temperature before venturing out, makes a huge difference. This involves driving in my ski boots. which I actually do everyday regardless of the conditions. When the topic occasionally comes up in conversation, people invariably respond that such a practice is either impossibly difficult, irresponsible, or illegal, which is all nonsense. I don’t find driving my manual truck is even slightly challenging (no different than heavy work boots and likely easier than high-heels), and there is nothing in the motor vehicle act (which I just browsed) that even mentions footwear. It’s only a 5 minute drive to Red, but I’ll often drive an hour to Kootenay Pass in my touring boots. If nothing else I’m sure not to forget them.
kootenayskier 
Anything to keep warm at -20 is totally acceptable, in my books! Enjoy the skiing, and Happy New Year, Darling, to both you and Elise. xxx