Both are so low right now, I'd love to see even average flow, let alone higher than average.
Dupe is good low or average. Higher can make the surface veg washing down river unbearable. If you can hack it, Dupe can produce some monsters. Short casts with search baits. Cover a lot of water.
Fox is good any time. Read Paul's post about fall feedbag. Apply to the Fox. Walk-the-dog downstream by outside edges, lifts, etc. Swim jig is better for areas of heavier current. I like downstream burns, but don't discount any angles. Cover water. The majority of the biggies I catch are first-cast fish. They're there or they're not. They don't take much coaxing to react.
Speaking generally to the forum community here, don't squander October online. Get out there!
...And post some reports!!!