Re Fall River:
Kind of a small fly game in that creek. Griffith’s gnat or similar pattern. It’s a clear spring creek type thing.
Be stealthy and fish upstream. If you do try a hopper type, I like a smallish, fat Albert. Run a small nymph dropper 12”behind it. I like a size 18 or 20 prince nymph, copper john or pheasant tail.
Evening to dark is best.
Be warned, this place is no secret.
good luck!
BB