I second the Love Valley WMA. I've killed a few hogs there. The area off of Gene Bond and Hog Pen roads is a good place to start. I have seen them out there in packs of at least 75. I have even seen some swimming across the Red River. I talked to the game warden out at Canton Lake. He says there's lots of hogs out there, but that a lot of the areas they are in are really inaccessible. I would try Love Valley if I were you. It's about 130 miles from OKC, but I have made plenty of day trips out of it. I've shot a lot of ducks down there too!