Well, this might be a little late, but I would have said be line to Island Fire 1 hour before they open the doors (they open riverfront's doors 15 minutes before the show). All indoor shows start getting long lines by 15-30 minutes before the doors open. For outdoor shows, like Stix because it is at Dockside, get there 30 minutes before the show. 15 minutes before is when most people will arrive.