That's a good point. I've spent a few nights out in dead of winter in Lower Northern MI. Temps dropped to around 10 below zero, maybe a little colder with wind chill. I was cold camping, just using a tarp, good sleeping bag and had a fire set-up to reflect heat under the tarp. I was comfortable for the most part, but I wasn't traveling either and there was no danger of getting wet and having to deal with that.

Setting up in your backyard/local park and seeing how all your gear works out would be the smart thing to do before getting too far into the Q/BWCA.

This "might" be a good year for going on a winter ice fishing trip. Talked to Q-Dave over Holidays and he said that unless something changed, it was shaping up to be a milder winter than they had last year.
Last winter was one of the worst they ever had.
Temps hit -40 below and stayed there for days.
Q-Dave told me that there were houses in town that had frozen underground water pipes up into JUNE!