thanks! i'm still not sure what we're going to do. . . i am just not a big fan of large tours and tour guides and tour buses. it's just not my thing! we're also on a budget. so if it's cheaper to take a mayan ruins book out of the library and take a cab...well, that just sounds so much more peaceful! and i'd probably be paranoid about not getting back to the ship on time, and so would be an hour or so early any way!