You should do it. Use the current version of Space Marine as a demo. It's not finished, but it's enough to show your skills as a game programmer and as a scripting language programmer. Who's going to be there? I wonder if any software companies may send scouts...? (I don't know if companies do that, but if they do, this is the right kind of event.) At the very least you'd get to meet new people and network with other programmers your age.