Hey Twig, A big welcome and hello. Your right about a great place to get good info and sound advice. As far as the river atlas question I think previous members have already steered you in the direction of whitewater rafting guides and publications. Now for some advice! It's always a good idea to post and ask before heading out down a piece of water you've never done before ,as I have seen my favorite rivers change coarse drastically in the four years since purchasing my driftboat. Always a wise idea to secure the knowledge of a guide for a day or two, just to learn the ropes on any paticular river. Even if you decide not to take the river on yourself you will normally catch fish and receive local tips and hints. Good luck and welcome aboard.