You need a lot of gear for winter. I have a "generic winter list" linked in my bio if you click my name, but understant that it is specific to my area and while probably as cold or colder
than you (northern alberta, canada) I probably don't get as much snow, and I don't in winter
tend to head into anything vaguely like avalanche country.

Most any pretense at "lightweight" for me goes out the window in winter. My winter stuff
fills my big gigantic backpacks, and I'm typically only weekending or 3 to 4 days out.

in addition to the other warnings posted by members of this site, I'd strongly suggest if
you haven't camped in winter much before take your intended sleeping system, shelter,
and clothing out and spend a couple of nights out in the back yard in winter getting used
to it, as if you aren't careful you can have frost wetting out your sleeping bag - which is
particularly nasty if you're only in down. The particular test you are looking for is that you can sleep in it one night, and then sleep in it the following night <img src="/forums/images/graemlins/smile.gif" alt="" />