I've done these tracks and they are an awesome drive but not too hard at all. More of a turisty drive from memory..
Never heard of the Clarke Brothers lookout but sounds interesting as I've read a fair bit about them. They used to hide out at Crow Valley then they buid a cop shop at Wild Cattle Flat about 6km away to catch them...LOL They got them eventually.
There's 40kg of gold burried somwhere as it was never found after the Braidwood robbery...bring your detectors gents:)