Re: Rangeley Lake, Maine in Sept
Rain gear and warm clothes! There's a big flyshop in Oquossoc that you can't miss. I think Rangeley Region fly shop in Rangeley might be out of business. Traditional New England streamers, caddis dries and don't forget the soft hackles! I caught the largest Landlock I've hooked to date on a GR hare's ear soft hackle at Upper Dam. Oh, and believe it or not, white wooly buggers.
Get a DeLorme Atlas and Gazeteer for Maine; you can use it to find all the moving water you want.
There's good cabin rentals at Haines Landing on Mooselookmeguntic, too.