We are travelling on Liberty of the Seas this November. My family of 6 includes my teenaged son who uses a wheelchair. We're looking for recommendations on affordable excursions in Costa Maya, Cozumel and Roatan that are kid, young-adult friendly & wheelchair accessible. We don't mind skipping a formal tour and taking a taxi to a destination, but we are not sure if there are wheelchair accessible taxis in the 3 ports. Does anyone have experience with the beaches, excursions, or self-tours?