Sounds like fun. I have never dove in Arkansas... I hear they have trilobite fossils there (as well as Missouri). Finding one is on my bucket list.
We'll probably be back there next year! It should be fun. As for instructors, I am honored you would even consider me. Your current one sounds great and your confidence in him is what's important. While exotic dives are fun, the local ones can keep you in the water year round. Lakes, rivers and streams were often used by our ancestors as dumping grounds, so you never know WHAT you might find. Glass bottles as well as other artifacts and even fossils are fun to find and are a good hobby to keep you in the water.