wondering what a safe time is to book an excursion (not thru DCL) at port in Cozumel? supposedly docking at 7:30 am and due back at ship byt 5:45 pm. What is a reasonable time to expect to be off the ship and on my way somewhere in a taxi? i'd prefer to book an early time so I can relax uninterrupted for the remainder of the time instead of killing time until our excursion and then having awkward time before we need to get back on ship. thanks!