I doubt if the discoverers actually want to keep it hidden as a grave site. A few years back, a buddy of mine found a cannon and a couple of other small artifacts embedded in the mud at the bottom of Burnt Ship Creek at the North end of Grand Island, NY. Burnt Ship Creek runs through Buck Horn Island (a 895 acre wooded area at the northern part of Grand Island). A few months after the discovery, some word of mouth reports got back to New York State officials who showed up and seized all of the stuff and took it all away. It has never been seen since.
Loose lips sink ships, eh?