Never been on a Cruise but going on a little 3 day out of Miami at the end of November with wife and two kids (11 & 8). It's on Royal Caribbean (Navigator of the Seas) which includes one day at Coco Cay Island. I keep getting all these emails about signing up for various dinner packages, drink packages, excursions, etc. Sure seems like a bunch of added cost so are any of them worth it? Would rather pre-pay then get some huge bill at the end but at the same time don't want to pigeon hole ourselves into doing stuff if the kids would rather just hang out. Expert opinions needed