Great job on the catch. Hiwassee is where I learned to fly fish as well and would do the same thing when I was learning in taking the spinning rod with me incase the flies were not working out. It wasn't till I started leaving the spinning rod at home and making myself learn to fly fish before I started to figure it out. Now I am casting a fly rod just about where ever I fish at warm water, salt water, or cold.
Speaking of Hiwassee I think it is one of the prettiest rivers to fly fish. The lack of development along the river and the mountains made me always feel like I was fishing a big western river.