I don't think the Chattooga can be called a "water trail" in any common sense of the terms. There are some serious errors on the map.
As for the Toccoa, again the map just does not depict reality very well.
Folks would be well-advised to buy a copy of "A Canoeing and Kayaking Guide to Georgia" by Suzanne Wielander et al. Most of the maps are more accurate, and there is useful, even essential description of these runs.
I've personally explored and described many runs in Georgia, and I base my recommendation on that experience.