As mentioned above, the Pine Ridge Unit of Nebraska is the easiest tag to draw,normally 100%. Eastern Montana also has a large population of Mulies if you make the draw. Mule Deer bucks are definately different than whitetails as they like to be up as high as they can get to see as far as they can while they bed down most of the day. The rut is the best time to hunt Mulies as you will see more bucks then as they chase their harems around during the daylight hours.The difference in pre rut and rut is amazing. The bucks seem to literally come out of nowhere. Unlike whitetails that live in close proximity to people and adjust to human scent and activity by hiding close by, if a mature mulie buck sees you or catches your scent, he won't stop running for a mile or more. For years it was common tobe ready to shoot if you jumped a mulie as he would hop to the top of the nearest ridge, turn broadside and look back to see what you were doing. Most of those are now dead but a few will still do that in low pressured areas, so alwayskeep that thought in mind.Now most run like an antelope or an elk making distance their safety. Practice with your rifle at the longest range that you can. Itwill greatly increase yourchances of successto be capable of making 300-400 yd. shots. Practice on a lifesize silhouette of a deer as that gives you an idea what the deer looks like in your scope at those ranges. Also a range finder is very useful as judging distances in mule deer country is a whole new realm of expertise.
Good Luck