I-80/I-15 is a good route. Just be sure about conditions going down Sherman (between Laramie and Cheyenne around MM 316-330), and near Elk Mountain (from MM 245-267).

Going west is worse than east if you experience bad weather. Now, is this a flatbed trailer, or a box trailer? If so, be mindful of the lightboard signs. if they say no light trailers, that will apply to you as they're specifically mentioning trailers with 20,000 pounds or less of payload.

Sykotyk