My Daughter did the Albatross Treasure Cruise (Disney's Yacht & Beach Club Resort Marina). She had a good time. She was the oldest thow (9). She enjoied the story and looking for the clues. Snack was PB&J. The treasure was cheap plactic junk. The Island of the Caribbean Pirate Cruise sounds very similar.

Island of the Caribbean Pirate Cruise (Disney's Caribbean Beach Resort Marina)
The young adventurers, with pirate bandanas, will board a boat resembling an old battle relic which will sail the "Ports of the Caribbean". The young pirates will be told the story of Old Port Royale and the pirates that used to sail these waters. In this adventure they find signs leading them to the Treasure. Once found they sail to Fort Cay where they will trade for grub. Upon returning, the Treasure Chest is unlocked and the bounty shared.