Smitty's Market oak wood pile & the Caldwell County courthouse. (Photo ©Chris Wilkins/Texas BBQ Posse) On our way back to Dallas from our recent Houston-area barbecue tour, all 6 Posse members on the trip listed their top 5 joints in the state, in no particular order. Specific criteria probably varied from person to person, but these would be places we'd drive across the state to eat at or recommend to good friends that they do the same. Since then, we've been asked to run each person's top 5. Those lists are below. Three joints mentioned by each of us: Killen's…