Our meat spread at Whitfield’s in Austin. From left top clockwise: Jalapeño & cheese sausage, smoked half  chicken, pork ribs, beef sausage, fried potatoes, sliced brisket & pickled beats. (Photo ©Chris Wilkins/Texas BBQ Posse) As settings go, Whitfield’s, the new barbecue trailer in southern Austin, might be in the most un-photogenic place we’ve encountered during a decade on the barbecue trail. “If it’s not first, it’s close,” Posse co-founder Chris Wilkins said during our recent visit. Located near the intersection of Brodie Lane and Davis Lane, the trailer and pits sit on a large gravel parking lot. No trees. Nearby,…