Orange Ave is nothing more than a fan fest. Sponsor tents live music etc. it's okay the first couple times but I'm over it, I don't go anymore. Image: http://bbvacompassstadium.com/sites/default/files/Revised%20parking%20map%205.2_2.JPG
Tailgating takes place in lots B and C. Tailgating should really be up and going around 4/5ish.
Orange Ave is right below the stadium, according to the map, where the street closures are.
DIRECTLY behind Orange Ave is Luckys Pub. Which is where I highly recommend you be before the game. Great food and lots of specials. 25 feet away from the stadium
Also go mingle at the tailgates lots of food and good people. The Texian Army tailgate is in the northwest corner (in reference to the map) of lot C.