they have a couple big sections of craft beer. its not widespread but you can get better-than-shiner beer. The Magnolia Beer Garden is right by the truck zone. They had a two sided trailer with somewhere in the range of 40 taps and then there was definitely one more similar two sided trailer that I saw somewhere else on the grounds.
North East side of the Cotton Bowl has a Wine garden and Texas beer area, probably close to 40 taps of beers from all over texas.