I lived on the river in Warren for 5 years. It had a really good brown drake hatch the last week of May. But as far as the trout except for at what they call the 'tailwaters'... I know people get them, but I spend a LOT of time standing along the banks from Warren up towards the dam and... just waited and waited, watching one big brown drake after another drift through ideal water without ever seeing a take. EVER. And the kids who fished up there, one who knew what he was doing, caught about one big brown every year floating the tailwaters fishing a rapala. But that was about it. If it was all "YEE-HAW" I flat missed it. Didn't see it. Maybe at some mouths of creeks. I just didn't see it, as much as I wanted to.
Most everything that has been said is right-on. The one thing that bugs me on that section compared to closer to Oil city, below President, is the traffic and camps. There are camps and houses along most of the river and 62 runs right along it for the most part. The long, curvy section from President to Emlenton is much more isolated and remote, and is noted by the PA F&BC as having a lot of big smallmouths.
I don't know where you're coming from, but the services here are not what you might be used to. From Buckaloons where the Brokenstraw comes in on down, there really isn't anything. Like the fellow said, the Tippy Canoe is a restaurant right off 62 south of the Tidioute bridge. There is a cafe on Tidioute main street and a smallish grocery market. Plus there's a bar and a gas station/deli and an icecream shop/self serve restaurant (you'll see) that USED to sell Pistrami sandwiches from a local guy who made his own pastrami from his own butchered beef. Yeah, where do you get that? Hickory has nothing I know of. Tionesta has an Italian joint called City Pizza that is WAY too good for such a little town. Used to have an excellent Orvis/pendelton/filson/north face up-scale real outfitter shop. Now a sad, empty shell. It was famous. I haven't had the success on Smallies as some people have mentioned in the upper water, but then I didn't fish it all that much. I fish President on down a lot in the summer. It's good and you tend not to catch dinks. 16" 2. 3 lb bass are nice fish and are frequently caught. Stick to the banks for active fish.
That's a little of my input. The water and the river itself, is amazingly beautiful. The water can be glass-clear. The aquatic vegetation is gorgeous: like floating over a garden. It is a beautiful place. I've been on plenty of rivers, but I can't exactly put my finger on it. Come here and see and maybe you can.