Yes, you are right. Sherwin's tour is about 3 1/2 hours long out to conch island with some snorkelling. Rent a moke and explore the island on your own this trip. Gives you a great reason to return for two days. We usually get there by noon, use the first afternoon for a tour with Sherwin, and have a vehicle the second day to explore and see different beaches. Then do dinner at one of the local eateries.