Iowa to Mesa,AZ- I40 or the "southern route" with 5th wheel

I-40 west of ABQ tends to get a little iffy in the winter. It may be clear and dry or it may be a ice rink. And it changes in a matter of hours. And of course there is Clines Corners (NM) I-40 Ex 218. Their weather is subject to change drastically in very short order at any time of the year. Last years pile up was limited to only a few miles in either direction but it made national news.

In winter, I tend to staying well south of I-40. But that's me.