Not really a "hike" but you could just spend 2 days up around
Newnes plateau and do side trip visits to "Deep Pass Canyon", "River Caves Canyon", "Wolgan View / Dry Canyon / Noble's Canyon" which are all enjoyable 1/2 day or less trips involving canyons. Some might involve getting your shins wet but definitely no ropes. These are good introductory canyons. There's also "Bell's Grotto" but all I remember from that was the awful stench.
A weekend down at Bungonia incorporating the walk through the main canyon would be good fun.
There's also another non-technical trip suitable for mid-winter canyoning but maybe some people would consider it too sensitive an area to disclose...