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.
William Marvin Walker was an American country music singer and guitarist best known for his 1962 hit, Charlie's Shoes. Nicknamed The Tall Texan, Walker had more than 30 charted records during a nearly 60-year career; and was a longtime member of the Grand Ole Opry.