We've long been interested in seeing Tulum, and we're finally going to do it on our next cruise.  Because of the travel time, I'm not sure it's the best outing, so we're going with the ship's excursions -- something we never do!  This is going to be a long day, and I want to be sure I understand what's going to happen.  I'd appreciate any help y'all can give -- and if "I don't know what I don't know", please tell me.  Thanks in advance.    - Royal Caribbean offers three separate Tulum