Labs, what if the guys said "we're here and plan on taking our time and hunting this piece"? I think it's decent you at least ask but curious what your reply would be as that would be my answer to someone in that situation.
There's nothing in ND law that gives the first group on a PLOTS (Public Land Open To Sportsmen) the right to lay claim to it until such time as they choose to leave. When it comes to a big PLOTS (I'm talking about good sized pieces of land, half section to a full section), multiple hunters or groups having to share is a fact of life, particularly after the first week when non-residents can begin to hunt state land...
The first scenario I described was opening day of resident only week on a piece that is a full section with parking areas 1 mile apart on the NW, NE, and SE corners, and a fourth 1/2 mile south of the NW area. That morning my wife & I were the first truck to pull into a parking area by a good hour, 1.5 hours before legal shooting time. Would it be reasonable that I would get exclusive rights to a full section of excellent public land because I was there first? Obviously not, I would have neither the law or common sense on my side...
The next truck in pulled up by me and we discussed our plans. That was the first truck of a group of 18 guys, I had myself and my wife. We mutually came up with a game plan where we all could hunt safely and not interfere with each other. They went down to the next parking area 1/2 mile south, and part of their group went to the SE corner parking area, while we stayed at the NW corner.
Right at legal shooting time another truck parked at the NE corner parking area, a 1 mile east of us. That turned out to be a group of three hunters who hunted south down the east side side while my wife and I hunted south down the west side. The big group set up an east to west push from the SE parking lot down the south side with blockers along the fence on the west side.
Once we had hunted almost 1/2 mile south, I could see what the other groups were doing. I easily adjusted our return hunt back to the truck so as to not interfere with them and never got closer than 250-300 yards to anyone in the other groups.
With a little communication and consideration, The three groups totaling 23 hunters all safely hunted that PLOTS at the same time, never interfering with each other. Each group got plenty of shooting & birds (my wife and I got 5, 1 short of our limit).
Seems to me that is virtually the definition of public land etiquette...