From my experience, the more traffic in an area, big bucks will have two options: Get out of the country or two (which I think is more typical) they will not move until you either physical step on them or make eye contact. The last two mature deer I have harvested were in an area I least would've expected, bedded in the thickest crap imaginable and never moved until I shot them because they figured noone could see them. One was 200 yds from a public road and we had just backpacked 6 miles for three days and were calling the trip quits when I lucked out and spotted him. Big deer are smart and I've been shocked at how they hunker down until they have to bust. Just my two cents.