Isn't Tray Mtn just another forest service road? I haven't been there myself -- gave up after heading out a couple of times, only to be out on dirt/gravel roads... only to Toyota Corolla's along the road.
Nothing against Corolla's. I'm sure they are good cars. However, any road that a Corolla can be driven on is not a TRAIL.
Try Beasley Knob as well... might be abt 30mi from Helen tho