Sorry can't help specifically for that area, I live just South of Fargo. Even with the slow down out West, there is still a ton of people out there.
Where I work, we have a partner that sells our equipment (rebranded) out of Watford City just south of Williston, we have not slowed down on sending them new equipment or rebuild parts for existing equipment.
Somebody posted this site a week or so ago,
This link shows a couple camp sites in the area, if you double click the mini map on the right you can change the focal point and look in different areas.
Map of Free Camping Areas | Go Camping for Free!
If you aren't set on staying that far North, you could travel south to the north part of Theodore National Park, should be friendly camping there.
Or if you go farther East, my wife's family is from Rugby ND (geographic center point of North America), in the few times that I've been up there in the last 20 years, it always seemed like a friendly (but boring) place.
Or if you really want to venture south and East of there, the Missouri Valley South of Bismarck has some nice areas with camping along the river.
Sorry I can't be more help, since moving to ND, we haven't done much camping. And I just brought home our first AS last weekend so I haven't needed to explore with it just yet.