Bibs, merino wool base layer, warm coat. Spent my formative years hunting northern PA rifle season, first Monday after Thanksgiving and continuing for 2 weeks single digit Temps were regular. Right now I have first lite solitude bibs, kiln long john, kiln henly, some stupid insulated mittens, a furry face mask hat, the uncompagre jacket & vest. I didn't buy the big jacket because I hike so far in i unzip the legs and only wear the henly up top until I get where I'm going, put other stuff on at the top of the tree.
You don't need to spend a fortune, but no cotton. Merino wool is the best, buy nice socks and base layers, and get bibs, they help with saddle bunching jackets and lower back getting frozen in the wind.
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