One of my questions would be has anything else in the area changed. Crop rotations, Poor Mast crop. Any land clearing going on. I've hunt this one farm for the past four years and based on what the farmers around this farm are doing is what determines what I am seeing and where I need to move. Once year a farmer came and just cleared out a huge thicket are the first week of October right before seaon opened. Years past it had been a major bedding area for a bachlor group of bucks in early season. After that, we did not see anything except a few small button bucks until late into the rut. So You may want to look around and see what may have changed. Just a thought