We used the Continental check in at the boat. Here is how it works:
When you exit the ship you go to your designated area in the terminal and look for your bags. This took about 5 minutes.
Then you either get a porter (if you have a lot of luggage) or drag your own outside.
If you get a porter, you tell them you are taking Continental, they take the bags right to the portable stand. There is a sign above each stand telling you what airline it is for.
You wait in line and check in, just like you were at the airport, and get your boarding passes. Continental reps put your bags in the back of a truck and take them to the airport. You do not see them again until you get home.
Take your carry on baggage with you - get on the bus or in your car and go to the airport. Go through security and go to the gate. No need to check in again. You already have your boarding pass.
It is SO easy! Definately a nice ending to the trip - no luggage to haul around.