Many people use a river outfitter to enjoy the whitewater of the Arkansas River. Look up an AHRA river rafting or fishing outfitter, photographer or shuttle service in the Outfitter List.
You can also go to the Arkansas River Outfitters Association website and learn how to choose a river outfitter.
Other links that are useful for Arkansas River outfitters are:
Rationing Plan, Special Use Agreement, and Associated Riders
AHRA Commercial Boating Use Reports
AHRA Commercial Walk & Wade Use Reports
AHRA Commercial Float Fishing Use Reports