We've always flown into SFO (and everywhere else) with only carryons. Kinda nice being able to walk out of the airport and leave without the baggage-claim dance.
also cheaper.
Although it's an art
another thing: Design lab fills up fast. Wake up early Wed morning and get in line before the building opens. It will look like you have no shot at a slot, you do.
Wednesday because the early go-get-it-done people do it on Tuesday, and the eeek-I-almost-forgot-about-design-labs people do it on Thursday
and DON'T LOSE YOUR BADGE.
your jacket will probably have a cool little inside pocket, keep it there when you're not in the building.
If your badge starts to fall apart (like tries to fall off the lanyard thing), take it to the friendly registration people who will print you a new one. If it falls off and you lose it, they will not print you a new one.
If you're ambitious, make something to cover up the shiny Apple logo when you get your badge. For whatever reason it wore off both of my badges during the week, which is very sad.
There is a balcony on the third floor of the building. Do not even think about using it as a place to get 'fresh air'. The air in the building is much cleaner than the air in the unofficial smokers-lounge.