The rules say something about two cases of beer per adult. That would be the purpose of the keg rule. I would be pretty comfortable bringing a couple og plastic mini kegs but I would know the # of ounces in that compared to the ounces in 48 cans. I just think it would be harder to keep cold, and definately hard to throw a few in your pockets when you go mobile! What ever you decide to do, have a blast and be safe!