A Possible Favor from San Franciscans

[plugkev]

I am heading down to San Francisco to run the marathon on June 16th.
I was thinking I might:

Camp outside the the city on the night of the 15th
Find a good place to park my car in the city on the morning of the 16th
And ride my bike down to the start if necessary

The start-finish is under the Bay Bridge

Can you recommend a good place to park my car on a Sunday morning?
Can you recommend a place to camp Saturday night?
Should I just grab a hotel? I am on a budget.

Thanks,

Kev