Following are a list of organizations and resources you might find useful.
Arkansas Canoe Club - Regardless of whether you are new to canoeing, kayaking or rafting or if you are a veteran, you will be among friends in the Arkansas Canoe Club. We are dedicated to participating in and promoting the sport of paddling by holding paddling schools and clinics, whitewater rescue courses, river cleanups and being active in conservation and river access issues..but most of all we have alot of fun!
Ozark Mountain Paddlers - was founded in January 1983 as a social organization by and for people who share a common interest in outdoor activities with an emphasis on paddle sports. In February 1983 OMP became an official not-for-profit Missouri State Chartered organization. As OMP evolved, so did its scope. Today OMP offers a wide range of regularly scheduled events in an effort to continuously promote Safety, Education, Conservation, and Sheer Paddling Fun!
American Canoe Association - a national non-profit organization serving the broader paddling public by providing education related to all aspects of paddling; stewardship support to help protect paddling environments; and sanctioning of programs and events to promote paddlesport competition and recreation.
Note: This is a great place to research rivers and water levels.