I drove I-80 through Salt Lake City the Rockies for a few days in a snow storm many winters ago, and would not willingly repeat the experience. That was in late February and early March, though. One advantage you have with your lengthy trip, and especially the motorhome, is you can lay over an extra day or two if you run into bad weather. Or even detour to better weather. Easy to figure out with the weather radar and information apps on our modern cell phones.
Plenty of time to hide the women and children.
