First off, don't limit yourself to one clear cut. Usually a lot of glassing from high vantage points is where to begin looking for mule deer. You have to find them, don't wait for them to come to you or you'll be waiting a long time, unless you have a known area that they use on a regular basis! This time of year, in mountainous areas, they will still be high, near tree line high. If big bucks have an area that has all they need to survive, plus it has very little human pressure, they won't venture far, until the rut kicks them into gear to look for love.
Good Luck. A truly big mule deer is one of the hardest trophies to come by these days!