I wasn't quite sure where to start this thread, might be more appropriate in "Style & Technique?" Moderators, if I chose wrong, my apologies!

Anyway, Where I live it typically will be in the 32 to 0 degree F (0 to -17 C) range through out the winter with occasionally much lower temps.
I've sorted out a pretty good routine for my small format excursions--good cold weather clothes, minimal equipment, and ziploc bag camera, lens, and film when returning indoors. I use my battery free cameras and a separate light meter I keep in a pocket so the battery for the meter isn't in the cold too long.

What large format specific considerations should I be thinking about?