The Courtyard is located at the airport. If you are spending any time in Venice prior to (or after) your cruise, it is very inconvenient and time consuming to travel back and forth between Venice and the Courtyard. If you want to return to the Courtyard to rest and freshen up after a day of siteseeing before dinner, you probably won't make it back into Venice that night... you'll end up deciding to eat at the hotel or somewhere close by. I was going to stay there this past September but opted to use points at another chain specifically for this reason.
However, if you have your mind made up that you'll stay at the Courtyard, here are some instructions on getting from the airport to the cruise terminals:
Enjoy and have a wonderful vacation!