The last 5 years the same thing has happened to me. In October I see 60-100 deer per weekend. I have pictures I took this year this year with as many as 15 in one shot. Several time I had 7-10 bucks in the field at the same time. There are 3 different alfalfa fields down there that they hammer. Then bam. end of Oct. first of Nov. I go to seeing 5,6,7 8 deer and no bucks. I dont know where they go or why. The alfalfa is still green, there are plenty of accorns there. Plenty of water. Also plenty of cover. I am beginning to think it has to do with the rut.