In the book "Hiking Trails of the Great Smoky Mountains" there is a description of the "trail" above Ramsay Cascade to the AT. It basically follows the stream bed or hollow up to the AT. Sounds like there is some dense rhodo to navigate through, but it also sounds like the stream has some beautiful falls and pools above the Cascades. I have done the 5 mile out and back hike. It is an easy hike, some on old roads and there is usually a crowd. However, it is worth it to see the trees along the trail. There are huge black cherries, chestnut oaks, silverbell, and tulip poplars. The Cascades are pretty spectacular also.
Julie