So, after finding the loot around the house, yes, they love pirates so much, they already had fake gold doubloons and my niece has plenty of dress up jewelry.
So, I loaded up the treasure chest and the kids and drove them to the lake. I then hid the treasure, making sure to mark the buried goods with sticks and stones. I laid out some of the things to save time, they were starting to peek, and then set them loose.
It was so much fun! After they found everything, they hid the treasures and had me find them. We just might do it again some time.