HELP!

So I mentioned on Monday that I'm going to the fabulously awesome SCBWI Winter Conference in NY.  Yeah, I'm pretty excited about it.

But I have to admit something...

I have no idea what to expect.  Sadly, I couldn't afford the Intensive, so no super awesome critique of my first chapter by equally super awesome agents.  :(  But what about the rest of it?

Have any of you, dear readers, ever been to a writer's conference?  How does it work exactly?  What should I do to prepare?  What should I bring?

Please help me!  :)