If you do one thing now, it should be to reserve your hotel room (you can cancel later if plans change, and hotels do book up!). We recommend:

Flights will be in in/out of SFO or OAK, and you'll need to rent a car or arrange other transportation to get to Calistoga - about 90 minutes north of either airport. 

Most importantly, please don't let logistics or lodging options keep you from joining us. Please let us know if we can help you figure out the best way to get set up for a great weekend.