RE: Looking for father/son North TX hog hunt
We hunted a place in Omaha, Texas which is in the Northeast section of the state. I believe it is called JP's Bowhunting Ranch. It is a bow only place tho so I'm not sure if that's something you want, but it was a blast! It is fenced in, but with a lot of acreage. They had several stands already setup and the amount of hogs was not a problem. They were everywhere. From St. Louis it is still probably an 9hr+ drive.
There is also a Ranch near St. Robert(Ft Leonardwood), and you can use a gun there, but i have no experience with this place.