Best advice: SCOUT SCOUT SCOUT.
Lots of window time in ND will usually yield a decent number of birds. Nobody is going to give you a location. Your going to have to come up with that on your own. Non-res opener the birds are not usually plummed out. If they are they are sorta half way only. I would wait until the migration. However, that can be hard to time. If you hit it right your in the money, if not you might regret the 30+ hour drive.
Grab one of the jumbo atlases. That is a great place to start. Just start driving the dirt roads when you get there. I had stuff all scouted out when I used to hunt back there and would still drive 200 miles in a day.
Best of luck. If timed right (or if you live there) the hunting is absolutely phenomenal!
Talk crap, get hit!