I might be confused ( shocker! ) :-D But I think that part of the caney by Sparta is the feeder to Center Hill Lake. Its more like fishing a lake than a river. I fish the caney above and below great falls dam and suck at it.
If I catch one keeper a trip Im doing well. Bass/crappie/bluegill. By June the bass should be more predictable.
My theory is this, Water levels and dam releases have a LOT of influence on fishing these areas. Get a cold rain, and it can turn the fishing off. THey stop pulling any water, and it can shut the fishing off. They start cranking the dam, and water temps below the dam plummet moving the fish. I really don't have a handle on fishing those areas so Im thinking of concentrating on fishing the main lake (center hill) where it would be a little more stable and patterns wouldn't shift at the drop of a hat.
Probably wasn't much help, but who knows.