You'll need the water running to float in your toon, and until you get comfortable & efficient with the oars, I'd remain on the upper stretch from the PH to Towee Creek.
The river has struggled through the drought, but it has been fishing well lately. If we keep getting rain (fingers crossed) the Hiwassee will fish like a champ this year. The HI flourishes on high water. It's floatable and wadable (in places) with the water on and the fish and bugs love it.
The information previously posted is good and will get you by for bugs.
Also remember you must wear a PFD while floating the river.