Pick up a map of the Buffalo National River at Pruitt, to see where the public campsites are. The nearest bike shop is The Bicycle Outfitter in Harrison. It can be busy on weekends and during rush hour. There is a 3-foot shoulder that will keep you out of harm's way. Do not try to cross the Buffalo at Erbie Ford during high water.
Flooding is most likely in early spring and during summer thunderstorms.
If you have trouble on this stretch you will probably be on your own. Respect the rights of property owners by heeding the No Trespassing signs on land along the way. A Park Service map of the Buffalo National River will show where the various facilities are located, but will only show part of the ride. A map of Newton County will show most of the roads used by the Erbie Loop. The Jasper 7.5 minute topo shows all roads on this ride.