I've never heard of either of those, but in addition to TNT:
Turkey Creek is north of Edgefield. It is similar soil to TNT, but faster with more rolling jumps, and no trails.
There is a track and trails at Manchester SF, southwest of Wedgefield. All sand (a few of the jumps built out of clay).
There used to be a track southwest of the town of Hardeeville (exit 5 on 95), but I haven't been there in years.
Society Hill has a track, Camp Coker, that I believe is only open for races of the Ultra and Mega series.
There was one west of North Myrtle beach, but I believe it is still closed.
There is a sand track near Batesburg/Leesville called Hell Hole, but I don't know if it's still open or has been worked on in the last few years.
Most of these (and more) are listed at
http://scohv.org
Let me know if you want more info or better directions to any of these.