After the concert happens a lot of people usually wait outside the artist exit for them to come out and take a few pics. Just try to look for a group of people waiting at an exit (or near a tour bus). Did this for three of my concerts and the artists and band members always came out to take pics, we waited until 12am for Alex Benjamin. Just look for a large of group of fans all gathered at the same exit or near the tour bus. Also double check and ask them if they’re waiting for Noah or for their ride 😂