Don't mean to be picky but I looked at the route in your first post, and don't understand why you are going that way. If you follow the Google suggested route (I-75 to Chattanooga, I-24 to St Louis, then I-70, I-80, and I-84, you cut off a few hours (and a few million people) from that southern route. I suspect snow will not be an issue at this point. My $.02.