I went to a Chiefs/Broncos game at Aarowhead stadium two years ago and even with the Patdowns I was able to sneak in 7 budlights. My buddies and I didn't want to pay $9 a beer so we decided to sneek in our own. I had 3 and my two friends each had two.
As we approached the gate one of my friends said, "Oh sh--, they are patting people down". They wanted to ditch their beers but I wasn't going to stand for that so I decided to try and get them all in myself. Two in each pocket, two in the belt line and one in my beanie (my hat was in the shape of a beer as I walked in.
They patted down my legs (right over the beers) and didn't say a word; nor did anyone say about the obvious beer I had in my hat. Moral of my story: if Buffalo is anything like KC don't worry about what they tell you can't bring in.