I know how long I could last in these temps.

They'll hit the thermal covers and try not to expend alot of energy in the deep snow.I always get the year mixed up but somewhere back about the mid 70's I think the NC had deep snow and then an ice storm on top of it.That year alot of deer broke their necks just from sliding down ridges.You couldn't break through the stuff.Then in the winter of 93 we kept hearing rumors of deer and turkey freezing solid standing in place.So we finally got up to see what all the hub bub was about.We took a long walk through 30 plus inches of snow and didn't cut a track.We eventually went to an area where cutting was done in the late fall and the tops were left.Bingo!Deer were everywhere hanging out in that one spot by the tops and thermal cover nearby.That was in 93.Today under those circumstances you might see two deer.