[JThiessen]

My senior year in high school, we played the state championship football game and it was 30 below, with a 20 mph "breeze"....I didn't really feel the cold until I snapped my ankle and had to sit the rest of the game. At least I didnt have to put ice on it.....

FWIW on the batteries. What happens in cold is that molecules dont move as fast, and you just see fewer amps out of it. Hence why in cold weather people buy batteries for thier cars with a higher cold cranking amperage. So I highly doubt you'll damage a battery. You may end up having false low voltage shut down, though.