I agree that the deer use these North South funnels to their advantage in regards to scent detection. After all it is by far their best sense and defense against predators. I have learned that often the best way to hunt a deer is to "give" him the wind in his advantage. For example on one of my farms we have a predominately SW wind and a major funnel that pinches between a soybean field to the south and a large river to the North. There is probably no more than 60 yards from the field edge to the bank of the river. The deer bed to the east of this and there is a giant acorn flat to the west of the funnel. Naturally a human wants to take the path of least resistance to the stand. In this instance that would put you approaching from the downwind side of the bed. Walking through the funnel where the kill zone would be and then setting up. By this time every deer within 300 yards would know your there. Instead I will come down the river bank to the Northeast and set up with my back directly to the river. This keeps me undetected from the deer on entrance, and with deer usually not thinking danger comes from the water will feel he has the advantage of know nothing to the south out in the soybean field is after him. Often times the set up on a mature buck is a game of inches...being just out of his scent tunnel as to not get busted but close enough to get an arrow in him. This is one reason I love chasing mature deer with archery gear!
