Whoa, I'm jealous!
I have never been, but would absolutely LOVE to investigate Mansfield. It's always been one of the handful of places that I'd do almost anything to get a crack at. We're trying to get to Fort Mifflin and Waverly Hills this year. Some of our guys did The Myrtles last year, which unfortunately didn't yield too much in positive evidence. But man, Mansfield is just awesome. That place has amazed me for a very long time.
Post back afterwards and let us know how it goes.
Good luck, and Happy Hunting!

Chris