A couple notes on license requirements; You DO need a license to hunt feral hogs. The TX game laws state that you do not need one if you are the landowner or his agent hunting for damage control only. If you are hunting for the hunt, then you need the license. 5 day non resident license costs $48. Full year for everything but deer and turkey costs about $160 and full privileges non resident yearly tag is about $360. You can also buy as many 5 day tags as you like.
If you are born after September2, 1971... you also need to have a hunter safety card (or your home state hunting license which shows you have hunter safety)to hunt in Texas. By a silly quirk in the law, you do not need this to buy a license, but you need to have it and show it to the warden when you are checked.