I've never been to the festival, but in looking at the site for it, I noticed they have vendor booths that will be selling wine and wine coolers, so unless there's something odd going on, it may be a safe assumption that beer will be available - you just can't bring any alcohol yourself.
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-Jeff
"May the Force be with you...for me to poop on."
"Russell! Somebody gonna get a hurt real badddd."