People get rescued out of the Cohuttas most years, usually from a river crossing gone wrong, an injury miles from a trailhead, or a storm that came in faster than expected. This is primitive-standard wilderness: no bridges, thin cell service, and long distances between help and the trail.
Standing dead trees are a real hazard here, not a theoretical one. The hemlock woolly adelgid, an invasive insect, has been killing hemlocks in and around the Cohuttas since the early 2000s, and dead hemlocks, sometimes called gray ghosts, stand throughout the wilderness. A dead hemlock or any other dead tree can fall without warning, especially in wind or after rain softens the ground. Do not camp under one, and give them a wide berth even walking past.
Rough Ridge Trail is currently closed for exactly this kind of hazard: storm and drought damage on top of an already unstable stand of timber. Check current closures before you go.
Flash flooding is a real risk on both the Conasauga and the Jacks River, and on the smaller creeks that feed them. These are steep watersheds that rise fast after heavy rain, even rain that fell well upstream and out of sight. Do not camp on a gravel bar or low ground near the water, and do not attempt a crossing if the water looks high or moves fast.