A line will form around 5pm of people who are trying to get into the holding area and since people wait until the park closes, there is usually a back up. Each ticket has to be scanned by a hand held device before you will be let into the holding area. It's not a big deal if you get there early.
One you're in the holding area, stake out a seat and just hang out, look at the park map to get a plan of attack going or people watch. Once the holding area is released, it's kind of like storming out but you aren't allowed to run and most people don't.