For what it's worth, Autzen is similar in size, a bit larger and typical attendance is 102% of capacity. Getting into the stadium runs quite smoothly, easy and fast, someone might want to see what the differences are between how it's handled at the two stadiums. As for Autzen, fans don't sit down very often, maybe during timeouts and half time. Concessions are run by companies that contract with the University of Oregon. Fans coming and going during the game is pretty minimal, plus everyone is already on their feet. Might be a little more traffic in the isles just before halftime or at the end of the game, assuming it's not a close game. Basically, people stay in their assigned seat area during the game.