when they spend time doing what they regularly don't do. Like instead of moving from a warm vehicle to a warm building, you now are in frigid weather for hours.
One course is to wear more socks and warmer socks, use warmers and big insulated boots, you wouldn't be caught wearing in suburbia.

It's alright to wear more things when you're doing the unusual. Actually sitting for hours in a frigid environment is abnormal today. Dang fool to think that's normal.
And for fingers I use hunter mittens. In the woods nobody back home is too worried that you're keeping your fingers warm and are ready for an instant shot. You can't dress for the folks moving from the warm vehicles to the warm buildings.
And I don't wear hunter mittens near people who never hunted.