The bigger bucks hang higher and sometimes get caught up high when big snows trap them up there. I've found most of the bigger bucks like to be on a high steep ridge, just below the lip at the bottom edge of good cover, like mahogany or spruce. Mahogany provides them good browse, and they can stay put for quite a while if water's nearby.
Get on a center ridge where you can glass several other nearby ridges, preferably within range of them. Glass, glass, glass...
