He said Charlotte in his post. Stoney hill is 2.5 hours south of Charlotte.
He included "SC" in the heading, presumably to encompass Winthrop.
We love visitors and think they'd enjoy Stoney Hill, but agree that, with the stated route, Stoney Hill would be considerably out of the way. The best route to justify it would be, if they're playing Richmond Hill, to come down I-26 and play Va-Du-Mar, then Stoney Hill, then back up to Winthrop or Charlotte (possibly adding All Terrain on the way).
Not knowing how much time they've got, but if it's limited then Charlotte and Western NC should more than suffice, with less driving.