I'm about to be that guy, but...
Unless I was working PR/Showcasing, I honestly wouldn't have much interest in going to E3. The conferences are about the only interesting thing. The reason PAX/GDC exist is because E3 is so media-centric, most of the time devs and fans will get pushed around just so journalists can get an extra turn playing some game.
If you manage to get in, congratulations, but be prepared to wait in massive lines and be swapped by cameras and event organisers.