Hello Oncefired,
First of all, you do need a license. Although it is legal to take hogs any time and almost any method, you still need a valid Texas hunting license.
This will cost you $25. No landowner will let you on their property without it.
http://tpwd.texas.gov/business/licenses ... ndex.phtml" onclick="window.open(this.href);return false;
There are a number of game ranches around you that sell hog hunts for $100 - $150.
Here is one:
http://www.dbhunting.com/rates.html" onclick="window.open(this.href);return false;
(Not a recommendation - I found it on Google)
This hunt will entail sitting in a blind near an automatic corn feeder and waiting for the feeder to trigger. Once that happens the hogs will come running and you can shoot one.
Some places will field dress it for you, others will not.
I too have heard that there are landowners just looking for people like you and I to take hogs off of their property and will not charge for it - they understand we are doing them a favor.
I am now convinced that these people are as common as unicorns. I wish you luck in your search.
If anyone knows of an opportunity like I describe above, I'd be happy to take the landowner up on it and I'll even teach Oncefired how to field dress and butcher a hog in the bargain.
I butcher my own game and eat what I shoot.