G'day Fuji. I think you might find that the track leads to the quarry and is off limits. I have heard of a fishing location around the corner from Rapid head. The location is called Yoho rock and I think the access point in down through one of the farms past the Delamere general store. There's a road not far past the general store called Yoho rd. This could give you a bit of a clue on how to get there. I have not been to this location before but have only heard by word of mouth.
Water probably still will be murkingdown at Myponga. I was down there Wednesday and It was unfishable, biggest waves I've seen at Myponga and Rapid bay. I wouldn't of thought it would clear for a long while now. Waits would be my pick
I was Driving back from yorkes that day and followed the storm as it formed out the back of Ardrossan. As we made it toward Adelaide we witnessed a scene just like that photo toward the Ed. airbase. The cloud just look like it collasped as we made our way back home to the Adelaide hills I cant remember seeing rain like that before. It was amazing. Love that Shot. Theres a web site you should check out of a fella up in the hills that takes alot of weather photo's it's hillsrain.com from memory.