If you are planning on fishing the Hiwassee tomorrow, i would be ready for some heavy fishing pressure.
Black stones 16, para adams/BWO sz 16-20 emergers 16-18, black hares ears and Pt's 16-18, Black or olive buggers
You will probably run into some rising fish during the later part of the day, especially after the water drops after a pulse. nymphs under indicators in the fast runs with some shot, buggers swing em slow and deep then a slow bump retrieve bringing them back.
Oh yeah unless you are going to be on the water at daylight, i wouldn't worry about the runs up by the powerhouse, they will be packed,
the shoals below towee have been fishing very well, just take your time.