tip for newbies re: print mapquest or other directions
If you are going to be driving around before or after your cruise, make sure to "map" directions to your planned destinations so you can print them out and take them with you. That's much easier than playing around with maps in the area.
In June, I'm going to be staying with my mom for 2 nights before my cruise and spending some of the last cruise day with her, so I printed out mapquest directions from her house to the Miami port, from the Miami port to the Miami Seaquarium, then from the Seaquarium to the Miami airport. I also printed the map as well as the step by step directions.
No time wasted or flights lost finding your way around.