I hunt Sika every year since 99. Greenbriar is not a real hot spot for sika, but I have killed some decent whitetails there. I did kill a 2X2 there in 2000. First sika I ever saw while hunting.
Section A, M1, M2, are all good sika spots, and I have yet to see a whitetail in those in the last 10 years. There are two ways to hunt sika, one is to sit smack dab in the middle of the swamp. Very productive but hard as hell to find the deer after the shot. The other way is to hunt the hardwoods on the edges, and wait till they pop out. Not as productive.