It's been 10 years since I hunted the Standing Rock but the hunting was good when I went, I killed in South Dakota & North Dakota both in the same day. Back then I just looked on their website at their "guide list" which was really landowners that allowed hunting and started calling names. I remember both landowners just wanted "beer money" as a trespass fee, haha.
PM me if you want and I'll give you the names that I wound up hunting on, unfortunately I do not have their phone numbers anymore but I have their names in my turkey kill spreadsheet!