Besides looking at what packages are available – see how much it would cost to put the package together yourself (flights/cruise/hotels). I did this once on an Alaskan cruise, which allowed me complete freedom to do my own thing post cruise. Although to be honest I reckon it only saved me £200 per person at most.
Be warned that if for some reason you fail to make the ship, that will be your problem, and there will be no courtesy transfers between airport/hotel/ship.



