I did indeed intend to catch fish, though that did not go well. The river is all pretty fast by the hiking trail head and the hiking trail quickly departs above the river to where I did not want to hike up in my wading boots nor hang-glide down to the river.
All in all it was like you said, an awesome place - though I dont think i saw a substantial falls.. enough to be a "final falls". I was about a half mile up from the Green Canyon CG.
I was going to drive down the gravel road towards Salmon Beach and work my way back up river, but maybe another time.
Thank you for the information!