You can buy them at the port. One VERY IMPORTANT thing, the Vallejo area is very unsafe. I was robbed at a near by Black Bear Dinner. Left the car in the parking lot and when I came back, all what I had inside was stolen. Be careful.

Your ride should be readily available. Never had a problem getting Uber ride at any of my California destinations.

The Ferry is a Public Transit system as such, it gets crowded at certain hours of its operation, like any Public Transit like a Bus for example, there will be room for luggage provided there is room for it when you board. I have used the Ferry from Vallejo all the way to the Airport with my luggage.

Some of the ferrys do go to Fishermans Wharf. I believe on the ferry schedule they call it pier 41. Watch the schedule for which times make this stop. Be sure to consider both going no coming. Otherwise all the ferrys go to the ferry building and from there I rode the trolley to Fishermans wharf. We had a transit pass but the fare was under two dollars and the trolley driver was very friendly and used to tourists. Either the E or the F line trolleys will make a stop at FW. If you go this way and pay the fare in cash you probably should have some small change. I'm not sure about the distance from six flags to the Vallejo ferry bldg but by car I don't think it's too far, maybe a half hour. When I googled San Francisco Bay Ferry I got a lot of great info.

Take the ferry for $20.00 to San Francisco and uber from the pier. Much cheaper

From their website: “Monthly parking pass holders can extend their space overnight for an additional $4. With crime the way it is in Vallejo, this may or may not be a smart move.”. So I’d say ‘no’. Perhaps instead park at a friend or coworker’s house, or another business’s secure parking area and take a cab or ride share service to/from the ferry.

The trolley runs from the Ferry Bldg to Fisherman's Wharf and back. There are two routes called the "E" or "F" lines. Either one works between these two points.We found it very handy and easy to use. The drivers are used to tourists and are helpful.

I did not notice - I know there are ramps down - - I suggest you contact the ferry service directly