wow! i never thought you could hang a deer in 60+..when we shoot them anything over 60 we put ice in the cavity and get them to the butcher asap...when its 40 or below(most rifle seasons except a few odd years) we hand them until we decide to leave camp and head home....then we take them to the butcher come back pack and leave....thats usually a day or 2 of hanging...i didnt notice a diffrence when it went below zero at night and didnt break 30 from the time we took the deer until the time we had them butcherd.....they were just really stiff and hard to fit 3 deer in a short bedded s10....i rather be safe then sorry i took an animals life and wasnt smart enough to keep the meat edible....