Get good boots, and a good pack, the rest of your whitetail gear should probably work if you dont have a huge budget. Cardio is great, but focus on step up and hills with a weighted pack. I would recommend being comfortable out to 50, if not only for the initial shot, but would also consider...
If your coming from out east, the elevation can be a factor. My hunting partner and I are from Wisconsin and he was basically sick with Elevation sickness all week. Drink tons of water. Talk to your doctor about a prescription or look at some of the elevation sickness products form Wilderness...
I'm looking for a Archery Elk partner for the 2016 season. Went on my first Elk hunt this fall to Colorado with one of my buddies. He suffered from what he thinks was Altitude sickness pretty much the whole week we were out there.We tried to go down and stay low, but it didn't seem to help...