You might want to get there just a little before 5.....from Backstreets:
GENERAL ADMISSION: HOW IT'LL WORK
With opening night just 24 hours away, we've gotten official word from the Springsteen organization regarding G.A. entry for the North American leg. Before we get to the nitty-gritty details, let's do an overview. The entire floor for each show will be general admission, with no reserved seating (actually, no seating at all). The G.A. floor is divided up into two sections by a rail: a smaller area directly in front of the stage (commonly known as "the pit"), and a larger open area behind it. A special wristband, distributed to a few hundred people as determined by lottery, will be required for access to the pit. Here's how it happens.
* Numbered G.A. wristbands (not pit wristbands) will be given out at the venue between 2:00 and 5:00 p.m. All G.A. ticketholders who show up between those times will get one.
* At 5:15, the lottery occurs: a random number will be drawn, and the person with that number on their wristband will be at the front of the line for entry onto the floor.
* Line-up starts at 5:30, in order by wristband number. If there were 600 wristbands given out and the random number drawn was 536, then people with wristbands numbered 536-600 will be at the front of the line, with 1-535 behind them.
* The line will enter the venue whenever they're ready to open the doors. The first x number of people in this line (x being a few hundred, will likely vary by venue) will get a second wristband for pit entry. Everyone else, including those G.A. ticketholders who can't get there until after 5:00, can stake out a spot on the main floor.