Your high country Muleys will typically end up in the basins they will summer in by the end of July, making scouting a key component of your success. Remember that 95% or the deer will use only 5% of the country, so some basins that look great may not carry. The snowpack this year is WELL below average, so the bucks are already transitioning and will be above 9-10k already.
If you are hunting true above timberline, you will most likely be hunting above 12,500 ft. where they bed in the cliffs or right below them in krumholtz patches aka (stunted pines above timber) You will want to focus on scouting first light to locate the bachelor groups before they bed up for the day. This will enable you to focus on key feeding and movement times to concentrate your efforts. Even thought the deer will bed out in the open, they are much tougher to locate once they bed, so that is why it is key to find them feeding in the graylight.
The deer will develop a routine that they will follow almost every day without fail even after they get bumped, they will most likely come back once or twice even if you do blow them out... Very much so creatures of habit unless they get too much pressure. There are usually a lot of hikers but the deer bed and feed fairly far away from human activity... If you have a trail going up into a basin through the bottom, the deer will most likely be bedded 1/2 mile away, high up on the ribbon cliffed basin walls above the trail anyway, so hikers rarely have any impact on the deer anyway... Hope this helps!