Keith is 80 or so. He was set up just outside the store on the uphill side of the tent, in the corner closest to the store, IIRC. I don't know who the younger fellow was. I just tried accessing Dixon's 2015 Gunmaker's Fair website to jog my memory but it looks like most of it has been wiped. When you mentioned "engraving away without a care" that reminded me of Keith's style. Sorry for the misinformation.
Blessings, Tiswell