Neat find. For such a big event, I'm surprised that I've never heard of it. You're right, there isn't a lot of info on the web. It appears to be a large event with camping, food and all. 130+ miles of mixed dual-sport riding. This year it is June 18, 2016. The registration form is here: http://lakewenatcheerecclub.com/yaho...6.94135216.pdf
I'm interested, I'm just really not a big fan of the large group rides. I would like to ride the area and get the GPS tracks though.
There are several older videos on YouTube, like this one: