My advice would be to use your glass more than your feet. Sit where you have a good view, and examine every single brush pile, tree, and sagebrush, to make absolutely sure there is nothing there. In September, the deer, especially the larger bucks, will most likely be in bacehlor groups. Take another thing into account. Bucks didn't get big being stupid, so don't shoot the first one you see.
I know of several people who have shot respectable 24" 4 pt bucks and have larger ones walk right on out soon after the shot. To date, my largest buck is the one in my profile pic, and I have gone a full 3 seasons without pulling the trigger (waiting for a larger buck). I have seen decent bucks, but have just not had the time to study one buck enough and make a decent stock without being busted. Kinda works out like that when you can only hunt for a day or two, and I prefer to hunt in the high country also. The one in my profile pic was sitting perfectly still in what seemed like a TINY depression, probably 600-700 yards away. I took off about 1/4 mile north, then 1/4 up the mountain, the started to work my way back south and up the mountain again towards the buck. I connected at less than 100 yds. And that depression was more like a small draw, probably 200 yards wide, and a good 30-40 feet deep. The only way we saw the buck, was a tip of his antler. He didn't move for several minutes, then simply twitched his ear, and tilted his head just a tad to let us know he was there, and the stock was on.

Good luck on drawing and the hunt!!!