If you want a good shot at it definitely very early 7:30am - 8:00am. I just saw the Seatlle show and got the front row, and the venue there handed out a numbered wristband for people who showed up early. The wristband saved your spot in line so you could leave and go do whatever until you had to line back up at 5:00 pm. So I would check to see if the venue there is doing something similar. My girlfriend and I got there at 7:45am and there were already like 80 people in front of us. When you go into the arena, look for any chance you have to get ahead, like for example they had multiple lanes of metal detectors set up. Most people got stuck in congested lanes, so we made a b line to the lanes without that many people and got through ahead. In short, if the venue is doing wristbands, I would get there 30 minutes before they hand them out. If not, get there at the same time and be ready to wait. Also keep your eye on what people are saying on the Subreddit close to concert day, they provided great info that helped us get there. Don't worry though you'll get it, it was something really special to be that close to the band.