If you want to be close to the airport, I stayed at the Hampton Inn & Suites Miami Airport South Blue Lagoon (www.hamptoninnmiamiairport.com) and it was very nice, but not much to do in the area. Closer to the Port of Miami, there is another Hampton Inn - Hampton Inn & Suites Miami Brickell Downtown (www.hamptoninnmiamibrickell.com) that is amazing. It is about one year old, and very well located by Mary Brickell Village - cool place to eat and play. Transportation from the Hotels to the Port is fairly easy. Both hotels have a cruise package with two one-way transport to POM but a cab won't be expensive - $10 from Brickell and $20-25 from the Airport. The company that makes the transportation for the hotel can get you a good deal for all your guests.