I think a lot of hunters are unaware of just how far many bucks shift from their summer range to their fall range. It is part of the male deer social dynamic to group together into bachelor groups during the summer months. These bachelor groups give bucks a chance to establish their social hierarchy long before they have dangerously sharp antlers and their bodies are over-flowing with testosterone. However, these social groups can have a range far from where each buck lives the rest of the year. Once these bachelor groups break up right around antler velvet shedding time, each buck moves to his fall range. That distance is often several miles. What this means to the small-land hunter/manager is that the bachelor group you've been watching all summer may not be on your property come fall (and hunting season). In addition, "new" bucks will start showing up on your property right about the time that bachelor group broke up and vanished. These are bucks that were part of a bachelor group "somewhere else," but as summer turned to fall, they moved back to their fall range, which happens to be your property.
And that doesn't even begin to touch the issues of range-shifting and expansion that occur around the rut. Not only do almost all bucks greatly expand their range during the rut (usually, at least doubling the size of their range), but some bucks actually move to a completely new range during the 4-6 weeks of peak breeding, and these temporary "rut ranges" can be miles from their normal fall range.
What this all means is the small-and hunter/manager can see several sudden changes in buck population over the course of the summer, fall, and early winter. Bucks that were on the property in summer may suddenly vanish right around velvet shedding. However, new bucks may suddenly appear about the same time. Then as the rut approaches, bucks that normally spend their fall on adjoining properties begin expanding their range for the rut and begin crossing your property. In addition, some bucks will move from their normal fall range miles away and take up residence in and around your property during the rut. As the rut winds down, these rut range-shifters and expanders will suddenly vanish, and bucks that left the area during the rut will return. Then towards the end of deer season, bucks may begin transitioning to their winter range. All of these movements can produce some really confusing patterns in which bucks are using your property on any given date.