I drove through Indiana a couple of Christmases ago when they had the two foot of snow in the Evansville area. I had Revos on my truck then and it drove well, but I also had the bed full of cargo (luggage, Christmas boxes, etc.) from my OKC - LEX trip. It appears there was freezing rain before the snow, because there was a sheet of ice under it. I used 4WD as an extra measure of safety, because the Indiana Highway Department didn't even bring snow plows out until after the Christmas weekend was over. They were totally negligent. I'd use whatever measures necessary to make sure you are safe on their roads.