So what's an early September mast-drop have to do with the rest of hunting season? Well, that depends. If a tree like this pin oak is one of the only nut-bearing trees for the year, chances are deer will have those acorns cleaned up in a week or two. Then, acorns will be a non-issue. But in my experience, if I find one tree raining mast, most of the prime-condition oaks in the immediate area will be doing the same. In a really good nut year in a region well-populated by oaks, acorns will provide deer food throughout the fall and into winter…and that scenario can change not only where deer spend most of their time, but how they behave. In a good acorn year I know I'm going to be doing little hunting on fringes and field edges, and far more deep in the timber. Deer are always looking for excuses to not expose themselves in field edges, and acorns are their perfect alibi.