Editor's note: This joint is now closed. We loaded up the truck and headed north to Clark's Outpost BBQ in Tioga on Saturday. We'd heard a lot about Clark's and wanted to investigate, they've been featured in both Bon Appetit and Gourmet magazines. In the past I've been known to say, "The words barbeque and gourmet should never be used in the same sentence," so I was a little suspicious. The drive from Plano took almost an hour, a little longer than we expected. The distance was almost 50 miles door-to-door. We rolled through beautiful rolling horse country and the…