Probably somewhere close to 90% of the dry flies I fish in the Smokies are #14 or #16. For the terrestrials, I would go with #12 or #14. Same with the Green Weenies. You can either weight them or not and if you do, either wire wraps or beadheads work. If you're using it as a dropper, unweighted or just a bead head work best for me. Don't forget your Stimulators, unless you were including them in with the stoneflies. I also always carry some bushy Wulff style flies when I'm fishing in the Park or National Forest.
Fly fishing - it's cheaper than a bass boat!