You can't really get rid of them entirely in most places in Texas either. The goal is to put so much pressure on them they become your neighbor's problem, not necessarily nice but, reality unfortunately. Since you can't hunt them at night, you're going to have to start trapping them, box traps will work at first with uneducated hogs but, they'll quickly figure out not to go in those and just tear up everything around them. I would strongly encourage you to build a permanent corral trap on the 36 acres piece (as I read it, that's your main problem right now) and put the hurt on them. You can cheaply build one with 4 combination panels and a dozen t-post. Leave one end not secured and use a wire to pull it open to the inside creating a door and set your trip wire on that. Google figure 6 trap for pictures. I recommend setting up.a camera and not actually aing the trip wire until you have pictures on the full group inside the trap. Then you'll want to bait around the edges as well as at the trigger, the goal being that they filter around the sides and allow time for more pigs to enter before one hits the trip wire. Kill EVERY pig you catch or come across. You'll be able to pressure the survivors off your place for a while. Leave the trap in lace though, that way you're ready to go when they return. It's best if you setup a feeder inside of it, if your laws allow it.
Good luck. Pigs are a real pain. I love to eat them but, I'd never allow them to survive on my place. I had 2 big boars show up last year about 6 weeks apart, the first pigs I've ever seen here in the 24 years my wife and I have been married (this was her dad's land). Both were trapped and at a buyer within a week of their first appearance on the camera.