Roy: We were in GC on the Triumph Apr 5-12. We booked Captain Marvin's Stingray City tour over the internet at $34.00 per person. The boat was not crowded, everything was perfect, and Stingray City was a not-to-be-missed experience. My wife is extremely wary of water (particularly the sea) and actually ended up trying snorkelling and loving it. Stingray city itself is the finest sand bottom, no weeds, and the amazing gentle stingrays, in waist-deep water. It was probably the highlight of the trip. So if you are worried about over-crowding, just don't book a ship excursion.