In year's past, the pickup games area has volunteers working. Basically, you can walk up to them and ask them if they know of any games starting up, or if you're running a game and looking for players, you can ask them to keep an eye out.
I would simply suggest that whoever runs the first pickup game for EnWorlders to pick a dark corner somewhere, and tell the coordinators. Be sure to mention that its specific for EnWorlders looking to game.
We'd probably want to try to establish a specific time so that a lone GM didn't show up and wait 7 hours for some other EnWorlders to magically appear looking to game. I imagine that most people won't really even look to start gaming until Thursday PM.
Of course, that's not to say that if other gamers aren't looking to game that you don't invite them, but just gives a slight priority to EnWorlders first.