Flags has some good suggestions. Proper attire is the only thing i focus on but it doesn't drop too low in NC maybe 20's late season.

Another note, if you do lair up and are thicker then you ever been i would suggest practice shouldering the gun or whatever your using in your gear. The feeling is slightly different or less smooth and you may also notice your eye relief may change slightly. Just something to take into consideration before your trying to aim at something.