The sneak route that is mentioned may perhaps be one left of iron ring. About 400m upstream of iron ring there is a bay to the left. If you take this you will find a neat little class 2-3 canyon (canyonarrows, or magical mystery tour) that comes out just below S-bend.
As for little trickle at low water its quite nasty. If you ever look at it dry there are lots of undercuts and potholes (but hey, lots of runs are like that dry)
You can also run the left boof line at iron ring or if you’re feeling lucky the centre line will go….. sometimes.