I didn't see it mentioned. I always have glove warmers in my bag, after losing the cabin heat one night putting those in my boots saved my feet.
All winter I carry a big dufflebag filled with extra gloves, head gear, another pair of winter boots. Obviously you might have to downsize if you're not flying a DC6.
Thanks for starting this thread. I know it could have been a big help for me when I first started my adventures up here.
Find a good quality headlamp. I use this
Petzl Tactikka Plus LED Headlamp at REI.com it has a red filter so you can use it while flying.