There are places that have high fences and buy and stock hogs to be hunted. Usually 100% guarantee. Most are just regular ranches that have lots of hogs in the area. Both use feeders to attract hogs. Walk and stalk can be done but you are much better off with a feeder hunt. Most activity will be just before dark. You'll get 1 shot and they're off and running. Go utube and call up hog hunts to get an idea about how its done. Lots of fun. I've taken my son on several. Lots of fun sitting in the stand and talking quietly while waiting.
Do some searching here on THF and you'll find outfitters and ranches advertising hunts and just hunters rating their hunts. There are places within 1-2 hrs of Houston.