How about this: If the weather is good when you arrive, take the water taxi one way. If weather is bad when you arrive, Take di plane one way and visa versa. The Texaco dock is only about 1/8 mile north of where the Caye Caulker water taxi drops you off (Tackle box dock), easy walking distance for sure. We have never taken Triple J, so I don't know why so cheap. Others may be able to explain. Keep in mind, The (land) taxi ride from Belize International Airport to the Belize City Water Taxi dock cost's somewhere around $25.00US. We usually take the plane (faster), but we always get plenty of boat time during our visits.