Then take a cheap cab ride to the port from there. It would probably be a lot less expensive than paying for parking. then do the reverse when you return or Dollar rental car is even cheaper but their office is near the MIA airport which is quite a bit further from the port but they do offer a free shuttle.
Charlie Brown is the main character in the comic strip, Peanuts.
I don't feel the way I'm  supposed to feel.   Linus: Charlie Brown, you are the only person I know who can take  a wonderful season like Christmas and turn it into a problem.  Maybe Lucy is right. Of all of the Charlie Browns in the world,  you are the Charlie Brownest.