You wear shorts to cycle in -24F!!!!!!!! I get chastised for wearing them in 40-45 degree weather. Isn't MN like the coldest state? I must be such a cold wuss because I need a balaclava for anything below 30, and live in hoodies until 45-50, and consider less than 30 to be cold. That said, I have cycled 2 miles in just a t shirt and a hoodie in 24F and been uncomfortable.
Having read up on Icebiking I would be fascinated to experience some really Arctic conditions, like you've described such as less than 0. Just to experience it one or two mornings, then have a return to the more familiar 35-50F Winter weather I get. People panic if night time temperatures plummet below 30 and some people insist on wearing Michelin man coats in the 40's when walking briskly (as they are), a simple heavy sweatshirt or light jacket would be enough