Although Marc's suggestion is great, I'm not really sure that you need to go anywhere.
Why? Well, even you yourself said that you have seen many signs of hogs. That means that they are there. What you need to do is focus on technique.
Go to the location where you said that you saw the signs of them walking around. Then, put out a bunch of corn and pour some honey over it. Go back every day, if you can, and see if they ate the corn. If they did, continue speading out corn (the more the better), and come back again.
Hogs usually walk around and feed all day but are more active during the early morning and late afternoon, especially under this hot Texas sun. As such, hunt during these times, close to the baited area, and you should see the hogs roll in.
Believe me, if I saw signs of hogs, I would do the same thing and I promise you that I would get one much sooner than later (which means that I would stuff my freezer sooner than later. :wink: )
Zachary