This won't help you now, but when we went back in the early fall there were times that there was no generation. Complete slack water. Not great for fishing but you could go anywhere you wanted (that had water) and fish.

With one generator it started moving a pretty decent clip. Still you can paddle against it but holding your position while you fish becomes problematic.

Personally, I cannot see how you could effectively fish it with more current than that. Maybe dragging a bait along the bottom while you were swept downstream.