Yeah, the key is to keep it low-key! I went to a Judas Priest/Whitesnake concert (it was my first concert) and I brought my metal wind-resistant bowl with me. When we got there, they were searching people and using metal detectors... With me being high already, I instantly got paranoid and like jiggled the bowl around inside my pants as the guard moved the detector over my body, haha

Now that I realize it, I didn't have anything to worry about... there's no way that metal detector would have found my bowl... I WAS JUST HIGH!

But really, I would just roll 10-30 joints in advance and put 'em in a cigarette pack or something. That's what it seems like everyone does! Because hitting a bowl and trying to be discreet about it takes a lot of practice.