I hadn't been to a huge camp in a while but went to WCNYC a few weeks ago. The event was awesome but it is overwhelming for me, even as an extrovert, when there were that many people at the camp. With a camp of that size, everyone seems to know someone and you end up more fractured in groups than I have experienced at camps with just a few hundred people. I believe they sold almost 700 tickets for NYC. I think I prefer a little smaller WordCamp. Not sure the right number but it seems around 300-350 usually feels best to me.