5 - 6
FATMAP difficulty grade
I would consult with Chick Scotts Guide Book and the ACC website photos/description of the route to Guy Hut.
In bad visibility, the Guy Hut route can be hard to stick to and the hut might also be hard to find.
Bring a GPS with the route and GPS coordinate of the hut.
Or just don't attempt it the visibility is bad.
Trust me, it isn't very much fun doing this one is bad visibility...