Just returned from 3 days in Shawnee NF. Lots of public areas to hunt.
We heard gobblers every day, some closer than others but like anything else you need to work at them and be well versed in the language or it will not work out well. Down there it is really seasonal some years the same week will have them calling like crazy and then next year they are locked on hens already and things are really tough.
Know the terrain well I have not had the best of luck getting them to come up hill and in many areas down there it is quite hilly so that poses a challenge also. Try to stick to one area to start and find the pattern that works there. Hope this helps some but the best advice I have is to go there and talk to locals and get out in the woods for yourself there are some areas that will produce better than others. You can also stop in the Ranger station in Harrisburg they are usually very helpful and can direct you to some areas.