I have hunted some places around Crystal Lake, but it is hard to get permission. There was an old general store, and post office, just before you get to the lake, that I have hunted. I found a couple barbers, wheats, and a few IHs. There are a few old cellar holes on the property, that I had permission to hunt, but never got to hunt them, because the guy sold the property, before I had a chance to. I haven't been able to reach the new owner, to ask permission yet, but will keep trying.
There is some good fishing out there also.
If you get permission to hunt, there should be a few treasures to be found.
Good luck.
Leon