Looking to find out if it is better to book excursions once off the ship if they are less expensive? Any thoughts on prices, types of excursions ( Princess Cays, Bahamas, Falmouth, Jamaica, Grand Cayman, Cayman Islands, Cozumel, Mexico) are the ports. Trying to figure out the best way. This is our 12th cruise by the way, so not a newbie...lol Looking for suggestions...