I enjoyed this video. I got it from Soak.net a site I visit regularly. Remember this video was shot in 2001. Many changes have occured to this canyon since then.
I looked through his other videos for something about D.C.H.S. But have not found anything yet. Perhaps we should email him @ this site?
The address is:
http://www.youtube.com/watch?v=RxkevPLZQnw
Glad to share !