I doubt very much if this would happen.
I looked at the schedule, and if I'm reading it right, the cancelled Voyager cruise is a 4-day. As Marc said, he was warned it might be cancelled. It almost looks like they scheduled it this way as a contingency. Too bad for the people booked on it, but I doubt if we need to worry about Navigator.
Since we booked our own air, and we both need a holiday desperately, I think we would just rent a car in Florida and be tourists--haven't been back to Florida for over 10 years, but I actually really like parts of Florida quite alot.