Parking Options for Drivers (SF)

Via Marina:
There is a parking lot (Portsmouth Square) directly across the street from Hilton, their fees are $26-27 per 24 hours. There is not in-and-out privileges, so if you are planning on just leaving your car for weekend, this is much more affordable.

There may be other lower-cost options surrounding the hotel as well.

Via Karen:
Also, one block away, there's the St Mary's senior condominum parking garage. Entrance on Jackson between Kearny and Columbus. If you pass the hotel on Kearny, make a right on Jackson and it's right there, it's the only thing between Kearny and Columbus. I think they have a slightly cheaper over night rate. I've parked there overnight but I'm not 100% sure they're open 24hrs so you may not be able to get the car at 5 in the morning.