I’ve never traveled from that direction but I’ve been to Crater of Diamonds 3 times with the family when the kids were younger and we lived in Texas. We always loved it! Never got rich but it was fun.
There was a southern style restaraunt there that had a Razorbacks theme and you could write your name on the wall. The cooking was phenomenal. I don’t remember the name though.
There is a website you can use for unique stops along your route. I used it on our trip to SD to break up the travel and stretch legs. I’ll try and look it up tomorrow. But boy, are you going to see some beautiful country! I’m jealous.
Humidity is heavy, so pack gills and plenty of bug spray.