One thing to look for is young pine plantations. Pines actually give off a little heat at this time of year, and their evergreen nature blocks brutal wind chills. I've seen deer absolutely packed into young pine plantations when the temps get down towards the single digits.
"Know where you stand, and stand there" --Jesuit Father Daniel Berrigan
"There is no reasoning someone out of a position he has not reasoned himself into." --Clive James