Expecting to celebrate NYE in Las Vegas. I have driven I-15 straight down and back, but not in the winter. I have also driven I-15 in Montana in December before, but only for 1/2 day or so. I will be sure to check the road conditions before we leave, but was thinking of taking a more scenic route to Las Vages via US 93. Does anyone have any thoughts on US 93 vs I-15 and which would be safer (i.e. less snow/ice). We drive a new sedan, but not a SUV or 4x4.