if u rolled up, put it behind ur ear and hide it with the thickness of ur skull, if u got bagged, hold it in ur palm and clench ur fist so they cant open it.
Cig box is the easiest method. They don't look there. Ever. Otherwise, stick it inside your sock/shoe if you are paranoid.
id say the cigarette box is bad idea, since everyplace i have been to has searched through mine (if opened.) id say roll your joints and put them in a cigarette box and then just seal with clear wrap and blowdryer. Or if you have gym shorts, cut a slit on the inside to hide stuff in between the two layers of cloth
I am going to take a stab at some more unconventional methods that you may use to smuggle weed into a concert.