Biz, I just got back a few days ago from a WYO rifle mule deer/archery elk hunt. I was about 1 hour from Jackson Hole. Shot a beautiful 4x4 with eyeguards and missed a 6x6 elk. Mulies have huge ears. Anything at or past his ears with good forks, shoot him. This was my first mulie. They are much bigger than whitetails. What will the terrain be like? We were in the high country approx 9k feet, all hills. I went out there with my 7mag at 2"high at 100. Oufitter advised a 100 yard zero because no flat shots. All up or down, which will make the shot shoot high. He was right on the money. Listen to your guide if he is good. Good luck.