Ozark Medieval Fortress

I'd like to make a trip out there, but after looking at it in Street View, and seeing the "Private Property" sign by the road, I'm thinking that it might not be such a great idea. Does anybody know if it's safe to go out there? I'd really hate to get chased off by a 12-gauge.
I had never even heard of this until this post. I looked it up and it does look like something that would be pretty interesting to check out.