Joe Wells, right, and his son Coby pose in the dining room of Smokin’ Joe’s Rib Ranch in Davis, Oklahoma. (Photo ©Chris Wilkins/Texas BBQ Posse) Barbecue is like the weather: Once in a while, it’s glorious. Once in a while, it’s awful. And Oklahoma isn’t where you go to find the best of it. Earlier this month, the Texas BBQ Posse accepted an invitation from the Chickasaw Nation to visit three of south central Oklahoma’s more popular barbecue joints: • Smokin’ Joe’s Rib Ranch in Davis. • Jake’s Rib in Chickasha. • Pigskins BBQ in Ada. To be honest, our…