That is what grandparents are for. She may be glad to see you. If not I don't think you will get it cheaper from the cruise line than the price NancyN gave for the taxi. I don't know how it is in Jacksonville but in Miami the lines getting into the Carnival dock were really long but there was a special line for their busses. Using your own also gives you more control. The cruise lines usually have you wait to get a full bus, and for all of the luggage to be loaded and unloaded. Sometimes they also have drop offs at different ships. This is may not a issue if you arrive early because you usually cannot get on the ship until noon or later. So you are wating in one place or the other.