i would suggest you read--"paradise below zero" by
Calvin Rutstrum..the main crux of the book is wilderness
wintering--he did all this in the 30-40's and lived in
the far north year round so this is no slapdash pick-up
info tossed together to make a book--one of his best food
tricks was to make up a big pot of stew with lots of meat
and lard--pour it into a square cake pan and set it outside
to freeze--while it was still "setting up" he would mark
off squares with his knife and when it was solid break off
the hunks ---which were one meal worth--and wrap in wax
paper..meal time came and one would go in the pot..anyone
who has winter camped will tell you than butter is like
candy and gets put in and on everything--