I have heard of all sorts of dogs baying hogs. Alot of dogs will get in there and bay, but it takes a really gritty dog to go in and grab the pig so you can tie it up or cuff it. I have heard of labs and pointers baying like crazy, and I have even seen beagles bay a hog.
Sounds like you just need a good bay dog. Have you considered the Black Mouth Cur? A man in mississippii named LH Ladner raises some fine ones, and I have been in the woods with a young male that came from his kennels. The bmc's are very loyal and make good pets. The particular ladner cur that I know is very gritty and a very nice pet as well. They are very gentle with children and I have heard of them killign snakes to protect a child.
Check out the Ladner website
http://www2.netdoor.com/~lhladner/