[Wasillaguy]

The wife and I have done a dozen or so. I think there were two we never found. One was obviously removed, so don't get discouraged. Some people just suck and mess it up for others.
It's a great activity for kids. We have taken our oldest grandkids, and looking forward to the younger ones getting old enough to enjoy it. Let them decide what trinkets they will leave, and what they want to take from the cache in exchange.
For kids addicted to the smart phone, it's an excellent way to get them up off the couch and out in nature.
It's also a great way to find pretty and interesting places you will want to return to.