Has anyone ever fished the Grand Falls Flowage and Long Lake up in/near Princeton Maine any help or assistance would be appreciated.  I tried to find a map of Grand Falls Flowage but was not able to find one online.

We had our state STQ on Big Lake and Long a number of years ago. A lot of fun. The flowage reportedly at the time had better quality. I didn't have a chance. They are all right there near Princeton Lakes are treacherous. The only advice I can give is forget that you are fishing for smallmouth and look for the horniest Largemouth looking water that you can find, stumps Lily pads cabbage and water reeds will hold the best smallies.