Honestly I don't fish summersville much as it is so deep, clear and huge compared to our other lakes that it makes it a pain to kayak fish or bank fish....most of ours are about 20 ft +/- maximum depth as well.
In the tribs, most of the structure will be along the banks, and being shallower water, they might hold to those spots shaded by low hanging /downed trees with a little more depth in the water. So finding a good medium between structure,shade and water depth will be key in those areas. In the Gauley there will be alot of rock on the bottom, but you would probably have to go all the way up towards the persinger creek boat access before it gets exposed (i.e. not silted over).
In the lake I fished last week not too far from S'ville, the crappie were post-spawn and all holding on points at about 7 feet in 9 feet of water and they may hold a little deeper at S'ville since they can. The battlerun area has lots of fish attractors, click here for locations. It is also the shallowest part of the lake and has the most coves/points....definitely the best area for fish habitat.
Tightlining jigs/jigging are my go to presentations when they go deep, often with a marabou jig with chartruese on it somewhere. But if you are comfortable fishing with jig n' bobber, I say go for it.
All this talk about S'ville and I realized I haven't been in awhile. I might just take the boat out there Friday to fish and swim a little myself.
Good luck!
Learn to not run from your problems....except when your problems are giant boars.