http://www.netex.quik.com/boars/hunt.html
I am moving to Garland in a few months so I have been doing a lot of research. Plus my wife is from Pittsburg which is a half hour south of Mount Pleasant.
It's actually really easy to find these places, I just went to
www.google.com and entered "Mount Pleasant hog hunting". You can find a lot of places through google, just enter key words like "east texas hog hunting" or "east texas hunting" and obviously town names + hunting or hogs.