Haha, what a coincidence... GC4QD53 was also the first event I attended, and I had almost exactly the same experience. The place was so packed and busy that I couldn't tell who was who. I did manage to meet the host and sign the log, and I also somehow ended up in one of the event photos. And, 5 years later, I now know well over half the people on the attendee list. And the beer was good.