The fee you pay on Carnival covers transport and climbing the falls. There are several different tours available that include the falls. Last year we did a snorkle and falls trip with transport by bus. This year we took the "Cool Runnings" catamaran falls and beach tour that turned out really well. Rode the Cat to the falls, did the climb, and then walk back down beside the falls ( excellent photo op ) to the water. Back on the cat (open bar & loud music) to the beach for 2 hours and then back to the ship. The trip is pretty structured so not a lot of time to wander off on your own.
61 Carnival: Mardi Gras, Ecstasy X2, Fascination X6, Celebration, Elation X5, Glory X5, Fantasy X4, Valor, Holiday X3, Imagination, Liberty, Spirit X2, Freedom X3, Destiny X2, Splendor X2, Dream X2, Conquest, Legend X3, Victory, Sensation, Paradise, Inspiration, Magic X3, Triumph X2, Miracle X2, Breeze, Sunshine X3, Pride
7 Norwegian: Sky, Jewel, Dawn, Epic, Pearl, Breakaway, Getaway
8 Windjammer: S/V Legacy X3, S/V Polynesia, S/V Caledonia, S/V Diamant, S/V Sagitta X2