If you get as far as Williston, and especially if your return train is late, you might get to see some oil flares. I went through the area during shorter days and the sight was somewhat surreal. See https://www.ndstudies.gov/gr8/sites/...-optimized.jpg for an idea of what I'm talking about.

It wasn't clear from the original post. Do you want to spend a night in North Dakota or just travel through? If passing through lets you tick North Dakota off your list, then you could also stay in Wolf Point or Glasgow. (I have no recommendation for lodging in either of those towns, nor for anything in North Dakota.)

I believe the most convenient hotel would be the Radisson Blu in Fargo. Fargo would also have, in my opinion, the worst times for getting off and on the train. I guess my weak recommendation would be to go to Williston, where there is a Hampton Inn. If the return train is on time, it will still be light as you travel through the oil field.