There's a Hyatt House in Minot, in a suburban area. Minot has a sort of airplane museum (in a different suburb) and a historical park with a museum and a historic church (close to downtown). Downtown has a historic district with some restaurants, bars, small shops, and IIRC another museum. In the suburbs, you see a lot of very quickly constructed low rise apartment buildings, often by putting mobile homes together, supposedly for oil patch workers.

Williston has a newish Four Points by Sheraton on the edge of town. The train station is right in the center of town. When I was last there, maybe a year ago, instead of a boom town, there seemed to be a lot of homeless people. Even during the oil shale boom, some folks from North Dakota don't consider it to be very safe.

For Fargo, many of the chain hotels are in West Fargo (suburb along the interstate), including a Four Points by Sheraton and an element (legacy Starwood, now Bonvoy).

However, there's a gorgeous independent restored historic hotel downtown in either Fargo or Grand Forks. I forget the name and details, but I saw a nice article about it with pictures when the place opened within the last few years.

Devil's Lake is a summer resort town. Rugby seems to have a small historic district. Don't expect interesting restaurant choices.

Personally, I'm fascinated by some of the dramatic scenery in North Dakota as well as seeing the effects of the shale oil boom and bust. The drive beyond Grand Forks through Devil's Lake, Minot and over to Williston and then south is great.