Pretty well established fact that, in a hardwood environment, deer sightings and harvests decline in a bumper acorn year and peak in a poor acorn year.  When acorns are plentiful, deer have to move shorter distances to find food, and less often (acorns digest slower than browse/ag crop plants).  In a poor acorn year, deer may have to travel greater distances to feed as well as feed more often, exposing themselves to hunters more frequently.