The SoHo is either on or off because it has only one generator as I understand it. I'm sure the locals can help a lot more than I can but I would not try to do any wading on high water. The tailwater is long enough that if the water comes on mid-morning into early afternoon, you still have plenty of time to get out and run downriver and get some more time in... Also don't forget the Watauga nearby as another good option. There are some nice fish over there and it fishes a little more like a mountain freestone stream. Good luck on your trip!