My wife and I are traveling to San Francisco for a mini-vacation next week.  We are going to a Yankees/A's game in Oakland and a A's/Giants game in San Francisco.  We have never been to either park before, so we are looking for suggestions.  How is parking?  Any favorite concession items?  Other things to do near the parks?  Should I be scouting Lincecum for a possible trade involving Hall?

Thanks for any ideas or suggestions!