I've fished the lake for decades, mostly in April & Oct ... and I've never fished above the 58 bridge. In fact, I've never fished upriver from Caney Creek. I've spent most of my time fishing between King Creek & Whites Creek. Most of my fishing has been shooting docks or casting jigs to deep fallen trees.

The TWRA doesn't seem to take much notice of Watts Bar ... they don't have a current "fishing report" for the lake, and their "fish attractor" map on the website is a picture of the dam (which is probably no biggie, since most of them are long gone)

If I was going to fish the area you intend to fish ... I'd go with their Chickamauga report : (copied from TWRA website) "Crappie: Good. Deep docks, brush piles in deeper open bays"