I remember working for a company based in Brookings SD twenty years ago. We used to have to spend a fortune ($100 per pallet IIRC) on specially heat...
It looks as though there are a few more "affordable" tickets available this year (If you can call them that!!) and generally the prices appear to be...
At 1800 miles, you will be pushed to make the journey in 3 long days by the most direct route, so to take a scenic route or detour to one of the NP's...