Will be hiring a car in Portland in April to do a 4 day drive down coast and plan to arrive in SF via Hwy 101 on a weekday mid arvo. Then plan to stay in downtown SF for a few days but have not decided where as yet. Looks like best options for returning Avis car are Hyatt Regency Embarcadero E9M, Howard St H85, Union Sq SF1 or Fishermans Wharf FMW. Any suggestions as to which of these locations would be easiest to get to coming from north? I assume I will be coming over Golden Gate Bridge. I probably could email Avis but more likely to get a better response here.