Those look neat, and sounds like quite an adventure to get there. Did you get permission from the property owner to be there? I read that it is on 189 acres of private property. I know you wouldn't trespass.
Apparently it has been posted but people keep removing the signs and some think they have to take pieces home with them or vandalize it in some way. Idiots like that ruin it for everyone. Hope you guys had a good time on your adventure.