Flight
Grand Forks will be the easiest and closest airport to fly int, however they do not have a lot of flight options. Another great airport is Fargo they usually tend to be cheaper, they have car rental and more airlines to fly through, the only downside to this is you have to drive about an hour into grand forks.
Hotel
We have booked off a block of hotel rooms for our wedding at this hotel so you will receive a discount just make sure you mention the Nagle wedding. If you wish not to stay here that is totally fine as well, there are a lot of other options for hotels in the area.