Depends on what you are trying to get out of WWDC?
Here are a few of my ramblings...
In the past I think they have had a few sessions/events just for student scholarship attendees, should know about those as soon as the schedule is published.
If you are you looking for direct help with app development(best way to handle X), then you will want to focus on the labs.
Personally I really don't learn that much in the session(1.5/2 hours) but you take away a lot of new ideas/info that you research later.
STUMP is fun if they are having it this year and the concert is hit or miss depending on who is performing. Be prepared to sit in line for the keynote(foam pad, extra batteries).