To the wedding 09.20.2014
For those of you who RSVPed “Yes” there is a shuttle the day of the wedding.
The rest of the time you have many choices!
You can take BART from either San Francisco or Oakland airport to Old Town (downtown) Oakland.
The stop is the 12th Street Oakland station.
There is also a ferry from San Francisco to Oakland (and Alameda).
It takes longer and is more expensive, but is usually less crowded, accommodates bikes, and has a bar.
You can also take a bus. BART and the bus systems take Clipper Card (prepaid or linked to account) transit card, so you might want to get one from some place like CVS/Walgreens.
These require an account to be setup, but some are pretty easy get going and most have Android and iOS apps.
You can also use on of the car share services like (I’m partial to Lfyt, but UberX just dropped their prices)
Uber (UberX is the cheaper choice and both are included as an option in new versions of Google Maps)
Rent a car by the hour from a person
or a company
Bike Share (mainly for San Francisco)
You can try these guys out.
You can get a 24hour, 3day, or year pass for unlimited 30 minute rides within each of those time windows.
Most of the pick up and drop off locations are near downtown San Francisco.