We went to the Evergaldes from the Pritikin Clinic in Aventura with some other clients in a minibus which we arranged ourselves by ringing someone local who was advertising trips.. It was not that expensive. Most places where you stay or even on line could arrange this kind of half day tour for you. If not pop into a travel office. But do it, it is really good! The air boats are something else and one thing I was determined to do coming over from the UK. Which cruise are you going on?