There are caddis and may flies in the Taney area. I live in Hollister and have some hanging around the door this morning. If I was going to tie these, they'd go on a size 12 or 10. That being said, if you're looking for these types of insects, you have to get up in the feeder creeks. I'll use Cooper creek as an example. I can go up Cooper, within sight of the main river, flip rocks and find mayfly nymphs and caddis larva. They are here, just not in the huge numbers like I would find in my native Pennsylvania.
I will tell you this, many guys kinda put pheasant tails, hares ears, prince nymphs, and the like, on the shelf here. I have had some of my best days on Taney with the "shelved" patterns. Those generic patterns do very well in variations. The frenchy has produced well, black and olive hares ears, and a prince will do well. I've fished them under an indicator, high sticked, or tight lined. Just remember, they're trout. They know how to do three things. Eat, keep from being eaten, and reproduce. Good luck and good fishing.