One option would be US 65 at Springfield, MO thru Branson to US 412 just north of Harrison. Then 412 west to I-49, south to I-40, west back to 69. That would at least eliminate much of the US 69 miles.
Another would be to stay on US 65 all the way to I-40 just north of Little Rock, I-40 to Little Rock, to I-430, to I-30 back to TX.
Both are relatively easy drives, nice scenery, and would not add significant mileage to your return. They would be slower due to a lot of it being 2 lane rather than interstate. US 412 is a little narrower highway, but not bad at all towing our 35' 5er. Lots of options from either of the above routes.
I-49 south at Joplin down to I-40 and over to 69 is another option would not add much time to your return and still add some scenery.