Both links take me to Dave's article. But, he has the dates wrong. Probably edited last year's and missed changing dates. Friday May 18 through Sunday May 20.
It directs me to
http://www.paflyfish.com/smartsection.item.252/2012-fly-fishing-jamboree-and-meetup.html
and I get this error
Corrupted Content Error
The page you are trying to view cannot be shown because an error in the data transmission was detected. Please contact the website owners to inform them of this problem.
I've been getting the corrupted page error using Firefox 9.01. In the process of updating to 10.0 and will let you know if I continue to get the error.