Miami Marriott hotel

I apologize in advance if this has been asked and answered in the past. I am wondering if there are any Marriott hotels in Miami that also have a shuttle from the airport that are close® to the Port of Miami. When i do some research all I can find is ones near the airport with a shuttle. We will have about 24 hours before our cruise so want to be located near some things that we can walk around and see and I think that the hotels near the airport will be pretty isolated.We have Marriott points to use so it has to be a Marriott. Any suggestions would be appreciated.

TIA

This would better be asked in the ""Florida Departures" subforum http://boards.cruisecritic.com/forumdisplay.php?f=495

It might have already been answered as well