I only stuck around for 20-30 minutes after the show ended. It was pretty easy to meet Mike, Ian, and Matt. Josh came out at about the same time as the rest of the band but his line got crazy pretty fast and he ended up needing a bunch of event staff to keep his line orderly. I was close to the front of his line, but by the time I left it was all the way across the venue. I’m not sure how long he stayed out or if he was able to see everyone.
I had VIP, so I had early entrance. I was front row, just left of center and it was awesome! People were lining up for the regular line before I went to the Sound Check party at 3:15, and doors opened at 6:00. I don’t know where you are so it’s hard to say how early you need to be, but I’d give it at least two hours depending on how big your venue is.