
Originally Posted by
glc
I forgot to mention - there are 2 downsides to I-94. You have to deal with MSP traffic, and due to the oil boom, hotels are expensive, frequently booked out, and not very well maintained in western ND. If you go that way, I'd plan on driving straight through from Fargo to Miles City.
I-90 is the best compromise in my opinion. Some things to see are the Corn Palace in Mitchell SD, the Badlands, Wall Drug, and Mt. Rushmore. If weather permits, I-80 to SLC, then I-84/I-82 would be my second choice. You have the option to stay on I-84 to Portland, then head north on I-5 - if you are committed to I-90 and the weather is bad over Snoqualmie Pass, you can take US-395 west of Spokane to get to I-84 and Portland.