Definitely the most comfortable way to get here. The coach is a lot more comfortable than on any bus or plane, plus you have a dining car, a cafe car and a lounge car. Can't beat it. Unless you're willing to pay for a sleeper car, but that's expensive.
Grand Forks International Airport
Grand Forks has a new terminal, named after fromer Senator Byron Dorgan who helped secure the funding for this handsome $22 million facility. Interestingly, it has only two gates.