From the SCDNR regulations.

"Deer Seasons on Private Lands. Game Zone 6.
No limit on antlered bucks.
Limit 2 antlerless deer on either-sex days.
Archery & Gun Hunts: Aug. 15 - Jan. 1, buck only
Either-Sex: Oct. 4, 11, 18, 25, Nov. 1, 8, 15, 22, 29, Dec. 20, 27, Jan. 1"

"With the Individual Antlerless Deer Tag Program hunters can purchase either 2 or 4 tags per person, for $5 each, which can be used on any day open to deer hunting with the following Game Zone restrictions: ... In Game Zones 3-6 tags are valid starting Sept. 15. Tags do not have to be used on scheduled either-sex days.Tags do not alter the daily or seasonal bag limits prescribed for Game Zones."

So in Game Zone 6there is no limit on antlered bucks. You should buy 2 doe tags just in case you want to shoot your two does when it is not an either-sex day.

In Game Zone 2 we have Bow Season starting Sept. 15, Muzzle-Loaders start Oct. 1, and Rifle starts Oct. 11. We have the same either-sex days when our season opens. Our limits are 5 antlered deer and 10 total, with no more than 2 per day. I'll probably buy 4 doe tags.