#1). In case you missed it, Teddy Roosevelt is HUGE in the west end of the state, "the badlands" where he had a ranch... T.R National Park... Point, federal land subject to use for shooting... But not all, becareful, please.
#2). There was a grazing assoc. in Medora (sp??) that was soliciting shooters couple years back. You could probably find a phone and ask. I think they worked with Dickinson or close...
What I understand, slightly shorter season, fewere dogs 'cause it is farther north and colder. Come prepared (they say). LUCK.