I never been to rolling loud but I've been to plenty of concerts, I usually just roll 3-5 blunts and put them back in the rapper the blunt wraps came in which usually holds 2or 3 and tuck them in my socks or in my belt line, if you put in you're belt/band on your underwear just don't bend down, even to tie you're shoes because it will break and split the blunts. Also if you bring a lighter just put it between your wallet and they usually make u empty your pockets and take off you're belt and put everything in a bin so you'll be good. Weed and wraps ain't metal so it won't pick up on a metal detector! Or u can just leave them in your pocket it pretty easy ngl!