I hunted that unit with a cow tag in 2008 during the 2nd rifle season. My best suggestion is to be in shape. That is a tough unit to hunt. I killed my cow at over 10,000 feet and that is after they had come down some. We hunted to the treeline a couple of days. I thought I was in good shape when I went out there, but found out quick it's some rough country.
rough country...ummm yaaaa...it surrounds the collegiate peaks....only the highest peaks in the lower 48! beautiful country but ya the elk like it high there. tree line is at 11000 feet or better here.
Try to put your tree stand in a tree with plenty of background cover, keep the prevailing winds for that time of the year to your face, and take care of those pesky squeaks and creaks your stand may have developed while sitting in the shed. A good treestand lube can be made by heating petroleum jelly until it reaches a liquid form. Some hunters have reported success by including a cover scent in this mixture before applying it to their stands.