Hi Nelson,
Actually, in the case of luggage missing, going with the cruiseline transfer will do you more good. I know somebody's luggage didn't get on to the ship until 3 days (into another country), but since they are with the cruiseline flight package. The ship provided them free overnight laundry and some spending money (to buy a T-shirt, toothbrush etc), during the time the bags not there. If you on your own, you will not have this cover and good luck on claiming it with your travel insurance, after you finish your trip).
Cindy