1. Contact TWRA and obtain a feral hog permit. This will allow you to do just about anything you will need to do to eliminate the pests. Info should be on their website and usually just takes a phone call.
2. Build a pig pipe. Google the term for instructions; should be instructions on this website as well. Once built, place it in a well traveled area. Keep in mind you will be shooting toward the pig pipe so place it accordingly. As previously mentioned, soured corn and/or corn mixed with kool-aid is a great attractant to get them started.
3. Set up a trail cam to monitor the pig pipe. This will give you an idea as to how many you have and when they're visiting.
4. When doing this, I like to zero my rifle so that POA=POI. If they're nocturnal I don't like to turn knobs or deal with hold overs.
If they're nocturnal, you might have to purchase some gear. I use a head lamp like this one:
http://www.dx.com/p/flood-to-throw-3-mode-cree-q3-led-headlamp-1-18650-44277 . It comes in handy for scanning. If you need a gun light, I use the Unique Fire HS 802. Both of these lights are clear, but go to Hobby Lobby and buy a sheet of green gel paper and a sheet of red gel paper (about $1.00 each). Some people favor green and some prefer red, no way to tell in advance. Remove the lens from the lights and cut out a piece to cover the lens. You now have a red or green light to use.
If you're using an AR type rifle you have a lot of options to mount the light. If you're trying to mount it on your scope, google "bicycle flash light mount or holder". One like the "Sight King" works well for me.
Hope this helps. I had a similar problem several years ago and used this method to eliminate twenty hogs. I'm in East TN too.