The posse samples meats during our first trip to Franklin BBQ. (Photo ©Chris Wilkins/The Texas BBQ Posse) When it comes to Texas BBQ tours, the Posse has a few tips to share with our readers. We've had 12 BBQ tours since 2009, covering around 5,000 miles. Our last trip, the Best of Texas BBQ Tour, covered 700 miles and 10 top Texas BBQ joints over 48 hours. Tip no. 1: Do your research and planning, have an agenda. Check out website's like Daniel Vaughn's Full Custom Gospel BBQ blog. Daniel has been to every BBQ joint in Texas and…