Rob,
Last March I played 3 on your list--Walnut Cove, Keowee Vineyard and Cliffs at Glassy.
The first two weren't very memorable---Standard Nicklaus and Fazio, respectively, though the latter has some cool lake-side holes--a monster par-3 in particular. Glassy, the original course on property, is a real roller-coaster ride though, up-and-down the mountain, with some sharp doglegs and fifty-mile views from the apex of the property. It's a little goofy, but fun regardless.