Just got back from a Peat Taylor tour and he is absolutely the very best! He includes the Falls in his tour price. He takes you straight from the ship to the Falls and gets there long before all the regular tour buses. The Falls is quite big, very clean and clear water.
After the Falls he takes you on a tour around the island and then is willing to drop you one place, pick you up later, whatever you want to do, he is very flexible.