Hi Elaine,
Thanks for the extra info. I actually walked up this track just on the saturday before you were there!
Slightly overgrown I agree, especially up toward the top the scrub tends to push you backwards. I noticed some markers had gone but the track pretty much goes straight uphill so it was ok to find. Plus we had a dog with us who navigated quite well
Wello might be able to help you regarding the route from Storeys creek to the Knuckle which you were thinking about.
Here's a photo taken from the Knuckle, might give you a better idea of the terrain.
It looks like you could reach the plateau either up between sphinx and storeys bluff, or up alongside coal falls.
Nick