Is there some where near the Marriott hotel to park overnight w/o question that is inexpensive?

Marriott self park is $40, valet is $45. Convention Center is $35 for self park. Valet is through the Marriott, so same price. Not sure if City Center offers overnight parking, but their all day rate is $40

Thanks for the info. Hopefully something less than the hotel @$35. A day.

I flew up to SFO and took the BART to the Mariott. Saw public parking but did not note the price

Yes the conference center is right next door and you can park there overnight. Parking in Oakland city overnight isn't going to be too cheap though.