Hi Dean!
I know the feeling about throwing rocks by hand or pellets from a Parker
OK - since I'm on a tablet, not sure how to post a screen capture? Anyway, it's the Kennebec .. Look up on Google Maps Indian Pond in Maine. Scroll North to the head of the pond. You'll see the Kennebec East Outlet which runs down from Moosehead. About 2/3 of the way down, north side of the river before it enters into Indian Pond, you'll see a small wooded island. No roads there, but wonderful country...
John