Carnarvon Creek is having a bit of a run at the moment, after 4+ inches of rain. The plot shows the past seven day's creek levels. The road has been officially closed by the Police - it's flooded, so forget it.
In the Gorge, Carnarvon Creek will come down reasonably quickly after the rain ceases and is just that little bit more spectacular after rain. Check out the image of the Moss Garden waterfall...
Of course, you're going to need to be nine parts duck to get up there to see it looking like this.