I was joined by an old friend last weekend on a quick five-stop BBQ roadtrip. Sports photographer extraordinaire Jeff Haynes, who was in San Antonio covering the NCAA basketball regionals for Reuters, had a down day on Saturday so we headed east on Interstate 10. The original plan was to hit three city markets and see what we found in between. All three joints were threaded together by I-10 between San Antonio and Houston. They had all received five stars from our friend Daniel Vaughn, aka the BBQ Snob, so I knew it would be a tasty journey. We planned…