I've been there once, wasn't terribly challenging (well, not mandatory), though the river crossing can be daunting if the water is up! There's more to the area, supposedly some can be fairly tough.
Dana/Powerguy of the West PA Xterra Club has been there many times, pix on their site:
http://www.westpaxterraclub.com/xcursions.htm
http://www.westpaxterraclub.com/CV/index.htm
http://www.westpaxterraclub.com/GDCXC/index.htm
http://www.westpaxterraclub.com/video/GDCXC.wmv

Brent
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