Just in case you get bored with fly fishing in the Chattahoochee, I thought you might want to consider another alternative...the fabled River Andelle, in another era a haunt of Ernest Hemingway and hotelier Charles Ritz.
The following is a reprint of an article in France Today which I thought you would enjoy.
http://www.francetoday.com/articles/2010/06/01/fly_fishing_in_normandy.html