Haven't heard about the Treasure Hunt, unless you are talking about the one that takes place on the Pirate Cruise. Your boy's would love that!!! They sail from the GF Marina, and hunt for the missing pieces of the treasure map on the beaches of the Poly, Contemporary and WL ,then they go to the beach near River Country and dig for buried treasure. The entire excursion takes about 2 hours, 10-12 on selected days during the week. The CMs and Lifeguards that run it are great!!! They wore appropriate, Coast Guard certified life vests the entire time, are feed a snack while they are out, and get to split and keep their share of the treasure. My DD was 6 when she went this past December, and she had a blast. They also are given eyepatches and bandanas to wear, that they get to keep.
If this is what you were thinking of, it is well worth it