Usually you can just wander around the parking lot for tailgating and everyone is pretty coll to party with. I am not sure as far a s buying any food. Usually people feed but I can't make any promises for you. If this is your first time at Arrowhead I would suggest trying to catch a KC Wizards soccer game on the SAT. I got in for $13 and got to go check out the stadium. I didnt want to miss any tailgating before the game!!