We have not found a good one in Arkansas. We take I-57 to I-55. There is one in Sikeston MO not far north of Arkansas. We went from there to Enid Lake south of W Memphis. The corp of engineer parks there were Persimmon Hill campground and Wallace Creek . There is one other that we used to use called Memphis South in Coldwater MS just off I-55 south of Memphis, but the last time we were there is was turning into a dump and they had raised their prices so we avoid that now.
PS - DO NOT stop at Grizzly's in Blytheville !
And - the I-55 we take doesn't stay in Arkansas very long 50-60 miles going either north or south.