Get youself a pair of poly pros also.
Don't just wear your all leather boots, they freeze.
You need some muk-luks or mickey mouse boots.
A arctic canteen would be another good thing to buy, unless you like defrosting water.
I also carry a wool blanket, it has multiple uses like laying on top of your sleeping pad to add insulation.
You want to be in a tent, wind is not fun.
I recomend catoma tents, snugpak sleeping bags, and the old down m1949 mountain bags.

I find that winter camping can eather be really neat, or cold and miserable.