I've done this route several times, and even more times in portions, and it never gets old. This route is available on MyRoute-app.com, and can be reversed.
The route takes you from a starting point of either Ozark or Russellville, Arkansas on I-40 (your choice of starting location, but you'll have to reverse the route), and then heads south to the plateau mountains along the Arkansas River and in the Ouachita Mountains (prounounced "Wash-i-ta"). The area you'll be travelling thru is some of the prettiest forest and pasture land in all of Arkansas, and each of these 3 mountain parks would be easy to spend a full day or more at. Both Mt. Magazine and Petit Jean SP's have beautifully renovated lodges that will make for good memories if you stay there, but call ahead for reservations. Mt. Nebo doesn't have a lodge per se, but it does have cabins for rent with very private backyards and views looking out from huge cliffs. These cabins book for months in advance, so the odds of getting one on short notice is nil, because yes, the place is just that cool.
Anyway, here is the .gpx map for your GPS device. I will include a couple of more posts below with more info.
I hope you try this route, as you will not regret it.
NOTE: SEE MY POSTS FURTHER DOWN TO FIND THE MAP FILES FOR THIS ROUTE. IT'S COME TO MY ATTENTION THAT THE INFOTAINMENT SYSTEM (HEREAFTER CALLED THE i-tainted SYSTEM ONLY ALLOWS FOR 99 WAYPOINTS PER ROUTE. THIS ROUTE HAD WELL MORE THAN THAT, SO I DIVIDED THE ROUTE INTO TWO DAYS, AS THAT'S WHAT IT WOULD TAKE TO DO THE ENTIRE ROUTE RIGHT ANYWAY. THANK YOU!