Ack! Arisia!

So I'm going to register online. What do I WEAR??? Where do I go to do the FUN stuff? Does anyone have any recommendations for "everyone you'll know there goes to THIS particular thing every year, so you should make sure you go too, and here's where and when to find it!" stuff? I don't want to just wander aimlessly and find out later I missed all the fun. And what do I WEAR???

Yes, I'm a bit apprehensive about this. It's one thing to go to a place full of people I don't know. That's not a problem. I like that. But going to a place full of people I don't know, where people I DO know are off in another world...that's what I hate. So I really want to hook up with some of you there!