Well I HIGHLY recommend you stay at least Thursday til Sunday and preferably until Monday because a lot of people stay and it's nice to be able to spend more time with everyone. Thursday is the best day for socializing though, it's much more relaxed.

Sign up EARLY! Yes, I'd definitely recommend it because I wouldn't trust the waitlist this year although in past years, most people have been able to get in. If you sign up tomorrow then you have three weeks to get your payment in before you get moved to the waitlist. It's definitely worth whatever you have to do IMO.

Vid in your head! You can at least listen to music.