Mitchells Creek Fire Trial Megalong Valley

Planning to walk from the Devils Hole, pick up old water board road then the six foot track and head for Dunphys Campground.
Do anyone know if i can access the Mitchells Creek Fire Trial from Nellies Glen Road? Then travel basically south past Black Billy Head to intersection Carlons Head and Dunphys...?
Haven't walked there and reading a topo is one thing.
thanks
Do anyone know if i can access the Mitchells Creek Fire Trial from Nellies Glen Road? Then travel basically south past Black Billy Head to intersection Carlons Head and Dunphys...?
Haven't walked there and reading a topo is one thing.
thanks