We have a group of 6 Texans fans traveling to this game. We have found a service called Bowl Bus that picks you up from Boston South Station and takes you to the stadium and back after the game for ~$30 depending on when you book:
Bowl Bus
855 725 5928
http://www.bowlbus.com/
Great deal to get you to the stadium and back again!
Are the plans to meet up at CBS Scene still on for Monday? Would love to get together with some other fans...