I have hunted the deer of the Missourie River Breaks,south side of the lake.I' m no expert @ mule deer.I have taken a number of buck decent bucks.I usally hunt the ride tops of early morrning and mid-morrning.If it is cold you can find them sunning them selves.Late evening watch the alflafa and wheat stubble fields.This works good also in the morrning,cath one comming off.

Also watch the rock out croppings or bases of buttes,them big bucks get up in the shade mid-day and to have good look out as to see what is approching.
I hope this gives you a starting point.BBJ Get Big " UN"

P.S.Their horns are lighter color over there due to the minerals.Do lots of glassing.