Glad you enjoyed the walk "the paddocks " are like a magnet to me and it is a destination I never tire of,the hut is kept clean by the owners and their friends and not always respected by walkers as I have carried out rubbish in the past mostly empty bottles.
The cave I have heard about but cannot get any information on (may have some indigenous value) there is also a really nice waterfall "Ladder Falls " further up the valley and some substantial overhangs worth a visit as is Wadleys Hut which is in a perfect setting.
As for heading to the Never Never you will need very good navigational skills to head up "Hartnetts track" to the Overland before you head down to Harnett Falls and the start of the Never Never
corvus