Wool, wool and more wool, ive been hunting in montana for nearly ten years now and have found myself trecking through at least three feet of the white stuff. A good wool coat and a wool pants will do really well to keep you warm and dry. And as for keepin snow outa your boots ive found just having your jeans and wool pants hanging over works fine ive never used gators though. Oh and make somebody in the tent drink a lot before you go to bed and tell them to stoke the fire when they get up to pee. And double bag it at night. Hope this helps.