I hunt in the heavy pressure general season units in Utah. I have been lucky enough to take a couple of nice bucks in the past few seasons. I am no expert by any means but I spend alot of time scouting and studying maps etc.
I don't know anything about the unit you are hunting in Idaho, but if there are alot of other hunters to deal with, like in Utah, I feel that you have to take a little different approach.
Opening morning: Everyone is excited and trying to hike faster than the next guy and deer are going to get pushed all over the mountain. It is really hard to find an unpressured/feeding buck on this day. Sometimes you still can, if you are back in far enough and the others haven't got there yet. But don't plan on that buck being there for long. Sure as heck when you start to make your plan, someone will bumble into the area and mess it up. On this day, I usually position myself up high in a saddle with well used deer trails where I can still glass alot of country (in case i can bed something down to go after later) and hope that everyones excitement to get to the top will push something up to me.
After Opening Morning: Remember all those pretty alpine bowls on the top of the mountain that had all those nice deer in them all summer and even on opening morning? Well now you will probably not even see anything that resembles a good buck up there until next summer. Where did they go? In the country that I hunt, they go down. For the rest of the season, I look in the thicker canyons about halfway down to the bottom of the mountain. Look for canyons that have no roads coming up the bottom. Try to find those places that have little openings in the trees here and there. These little spots of feed may only be about 15 feet wide, but that is all a big buck needs until he has to head down for the rut. Hours of glassing is the key, not hours of hiking.
Every place is different, it usually takes years to figure out an area.