Must show this thread to my husband. He got interested in Sacred Harp back when we lived in Worcester MA. (I had done a bit in college as well.) Those names are familiar, but I can't remember which singings he used to go to.

I do remember going to a wedding in Vermont attended by a lot of morris dancers, and asking my husband whether we'd seen a lot of the same people at shape-note events, or whether they just looked a whole lot the same. We finally decided on the latter with perhaps an occasional instance of the former.