i dunno, iv never ever seen drug dogs at a concert so i dont know why youre worried...umm i guess you could take some joints in a baggie and tape them to your leg or somethin...or hollow out a (fat) sharpie and see if ya cant fit a couple in there...you could take a pipe, but if your at a concert and ever wanna see it again id advise you to leave it at home...when i go i just stick 5 joints and 12 ciggies in a hard box cant hardly tell the diff...hope this helps lol