Are the cams that are getting the footage more centrally located on that 450 acres or are they on the outskirts? 450 acres is a good number for "holding" deer as long as it has the big 3. Food, Water, and Cover. Those 2 may have drifted into your property and set up home. As far as South Carolina deer go, they are both good deer. Still a bit on the young side but they might well end up being very dominant this season and producing some fine offspring. If it were me, and Top don't bite my head off, I would let them walk till at least after rut. Let them breed up a few Doe. Just my opinion on this. If you would like to see your property start producing some fine racks, then you will have to let the young ones mature and breed.