The deer on our property are like cattle except the mature bucks. When they hear the sxs leaving from filling up the protein feeders they immediately come sometimes within minutes. But the mature bucks even the ones who would come in within minutes when they were younger tend to shy away until nightfall. It is of my opinion that they get a little more cautious and a lot more lazy. they wait for the other deer and coons to knock the feed on the ground and feed in the coolness of night. As for whether it affects them from a hunting stand point I would tend to believe as long as you didn't park directly by them or have the scent of the atv blowing to them it would be of minimal impact. I figured some loggers would give their stories of big bucks walking up to their equipment because of their curiosity but I think that has more to do with the smells of the disturbed earth than it does their machinery