Ya might consider taking him to Gatlinburg's stocked area for kids. I believe he can still fish in the kids area, but any of the area fly shops or even the welcome center could tell you for sure and also let you know what license requirements are It should be easier for him to catch stockers and that could in turn help him build confidence and develop technique for the wild streams.
PS: That is not to say that it wouldn't be a great idea to get with Hugh, Hugh appears to do a great job of getting newbies schooled and into some fish from what posts I've read over the years...
"Fly-fishing has many attributes, but none more pleasing than it's ability to liberate the young boy that still hides within me and to let that boy live again without embarrassment or regret, sorrow or anguish." Harry Middleton