moflyangler, Oct. is a great time to visit and fish here in the Smokies. I tie my own leaders but a good quality knotless leader from 7.5 to 9 ft tapered to 4X is standard. I also carry 4,5 and 6X tippet to use depending on water levels and sizes of flies used. Stealth and presentation are usually more important than tippet size here. Good luck.