Consensus is probably a mission impossible on a barbecue tour. Too many people. Too many sensibilities. And let’s face it, rib people are different than brisket people. The Barbecue Posse, though, almost reached consensus when we visited the Loco Coyote Grill near Glen Rose on a summer Saturday. It was part of a 9-hour, 210-mile barbecue tour that took us southwest of Dallas, to the Brazos and beyond. “Those ribs were the bomb,” R.J. Hinkle, a free-lance photographer making his first trip with the Posse, said of Loco Coyote. Another tour newcomer, Michael Gluckman, general manager at Fearing’s at The…