This was our third cruise with RC, our first on Navigator of the Seas, our first time leaving from Port of Miami. We picked this cruise to spend time with friends attending Pool School on board.
We live near Tampa and we decided to drive to Miami port that Morning. If you are driving in, consider driving down a day before and stay at hotel near the port to avoid concerns about traffic/flight tires/car issues etc. If you are flying in, fly in a couple of days earlier and enjoy Florida. Avoid meltdowns from airplane delays by giving yourself a cushion. Also, when you return, make sure you give yourself time to make your flight. Traffic is bad in Miami. Use Self Assist (you carry own bags) and leave at 7:45AM to beat the crowds. We did and were very happy with the experience.
Our Drive to Miami port was without incident. We found departing terminal G, got our bags to the porter, and parked at the parking garage. The garage parking costs $20 a day, and they take cash or credit card payment when you leave. I like the convenience of being able to walk to the car when returning from the cruise.