Traveling end of next month with 14 and 18 year old daughters on Carnival and interested in tips from others who have traveled with older teens and best way to handle shore excursions. Is it safe to let older teens go off with other teens (particularly Cozumel). Husband & I want to do Mayan Ruins. Older teen wants to do horseback riding tour and younger teen thinking about staying on the ship, but still undecided. What about going separate ways at other ports? Yes, we do plan to spend time together

and may stay together in port, but want to allow flexibility if safe to do so. Second family cruise so familiar with shipboard activities while in port as well. Thanks!