Barry, you will certainly like it, especially the upper and main waterfall. Unfortunately I couldn't access the main waterfall as it was just too slippery, so I decided upon the lower tiny waterfall.
If I had turned the film back to landscape mode, then I would have almost all black on the right and a tree fern dominating on the left. One leg was standing in the water, but wouldn't have been if I had used the 90mm.
I decided to look up some online pictures and found out that the state forest park is now called Mt Buangor, with the eastern section having Mt Cole; a very short distance from these falls, with Mt Langi Ghiran in the western part of the state forest park. I've always known this part as Mt Cole, apparently not these days.
I would suggest that if you can, get there in a short time frame, do so. The landscape at the moment is fantastic, what with water everywhere, foliage just dripping constantly and all sorts of little waterfalls wherever one looks. Gumboots or good walking shoes, are handy if it is actually raining!
This was the Langi Ghiran campground last Sunday morning after it had stopped raining in biblical proportions, I'm in the dry section and the rivulets of water in the foreground, were raging creeks of water earlier; nature is wonderful.