Josh Johnson, left, and friend Cooper Furlong dig into pork ribs at 2M Smokehouse in San Antonio. (Photo ©Tom Fox) Over a decade on the barbecue trail, the Texas BBQ Posse has seen a lot of things. But we ran into a first last Saturday during a visit to 2M Smokehouse in San Antonio: A couple of young guys fueling up on smoked meat before their two thousand mile road trip to Oregon. Talk about a cross country adventure. Cooper Furlong of San Antonio and his friend Josh Johnson of Los Angeles arrived at 2M Smokehouse at 8 a.m. and…