Out in the farmland where I hunt the deer pay little attention to trucks and tractors as they see them every day. That trophy and or non trophy deer. I have set in my pick-up out in the hayfield and had them walk within 25 yards and unless I move inside the cab, they hardly look my way. Even if I get out and stand beside the pick-up they just trot away. During the heavy part of the seasons though its hard to drive closer than 200-300 yards before they bolt. However even during season the pay little attention if the truck is sitting still with the window up so they don't catch humane sent. These however are mule deer. The whitetails are a bit more skiddish. They are not apt to come closer than 300-400 yards of a parked outfit. After season has been over for a few weeks then the whitetail relax a little and act more like thier Mulie cousins