The Chaparral WMA has a campground where you can put up a tent or take a travel trailer and set it up. The campground has restrooms and showers. Or you can drive to Cotulla and stay at a hotel. Its about a 20-25 minute drive from Cotulla to the Chap.
They will put you in a compartment to hunt. Bring plenty of corn and put it all up and down all your senderos in your compartment. Now you can just walk your senderos and stalk/sneak up on those javis!