I used to live in Bozeman and sometimes went over Bozeman Pass at 10-15 mph (with chains). We left Helena about 3 p.m. and got into Big Timber at 6:30...stayed at a motel packed with guys from a Texas seismic crew. They looked like they all wanted to be back home the next morning. Our worry was that the roads up north would be drifted in, but they were mostly okay. We hunted about 15 miles NNE of town.
One clarification: I meant to say that my POI on the animal was 2" farther than I compensated for. The buck was NE into the wind and I aimed right in front of his shoulder, thinking it would land about 8" inches left (just behind the shoulder). When I looked at a ballistics table after first posting, I saw that it's more like 10" at that distance. I gotta confess I never paid a lot of attention to windage before this year. Most of what I know about it was from a training video on the M1 (http://www.archive.org/details/Rifle_Marksmanship_with_M1_Rifle_Part_1
). Amazing to think that adding a 13 mph crosswind will deflect the bullet as much as my total rise and drop (8").