Agreed that Aug alpine is fun. All the mountains have good bucks on them. Some are more pressured than others, but if you are smart about how you hunt them, you should be seeing good bucks. Not uncommon for me to pass up 20 or more bucks and go home empty handed. Big bucks are rare, but 95 inch 4x4's aren't too hard to find. My advice would be to be careful where you camp, watch your scent, don't skyline yourself, and don't be an idiot about movement. Most of the bucks are nocturnal. With the pressured bucks, you have an hour or two at first light, and about an hour at dark. During the day, it's like a ghost town up top, or just does and immature bucks. I've had people swear to me that their isn't any deer on a mountain because they were not there at first light or they camped in the wrong spot. The early bird gets the worm. Or, if you are just lucky, you'll walk up on a bedded buck during the middle of the day. Don't' count on it though.
As far as weather goes during August.. We call it fogust. Fog can really screw over the most carefully planned hunts. It can also rage in Aug. 40-50knt SE winds and driving rain can keep everybody off the mountains. It's a roll of the dice for the visiting hunter.
The Rut is the other key time to show up. The last week of Oct through Nov can be very good. Hard to beat the first few weeks of Nov. Most of the locals use a call to coax in bucks, or to get a doe to come in with a buck following. A call can be a blessing and curse. If you know what you are doing, you can do very well. If you suck at it, you are alerting the older, smarter bucks. If does and young bucks running towards you floats your boat, blow your call. My advice is that if you don't feel good about calling, don't do it, or do it very sparingly. Put me in the sparingly camp. I like to hunt as high as I can, and as far way from the roads as I can during the rut. The days are shorter, so you really don't have a bunch of time. I usually have enough time to bust ass up a mountain, get in a few hours of hunting before working my way down. Often times I see the bucks on the way up and on the way down. Working edges is what you want to do during the rut. Look for does. Glass a bunch. With all the thick cover on POW, realize that a trophy buck could be anywhere. The weather can suck beyond belief during the rut. Inches of rain in a day, 50mph plus winds. Be prepared for that. But, you can always hunt in the rain wind. My brother showed up last year for a week of rut hunting. It blew 40+ every day except the last.
And, if you feel like a wuss, drive roads and hunt clearcuts. That's what most of the guys do. You'll still see bucks. Some of the biggest bucks are killed standing on the side of the roads during the rut.