Texas BBQ Posse members were treated to a special stop on the barbeque trail on Saturday afternoon. Expert backyard pitmaster Marshall Cooper invited us to join his family and friends for an incredible spread of smoked meats and sides. Marshall began following our BBQ tours through Gary Jacobson's stories in The Dallas Morning News. He wrote Gary, "I would like nothing more than to include you and your entourage at my next backyard BBQ. I will slow smoke beef brisket, pork ribs and pork shoulder and make sure there is enough for everybody to eat until they are stuffed! Just…