Ive never tried fishing down that way other than once many years ago using a kite …
I have heard of a few guys taking rig opposite shag rock ….and I know many years ago both eles and rig were commonly caught in the estuary ….how far up I have no idea
Also , Tim the crab man until recently often set a few hooks not far off that area and caught a lot of rig …..
Id recommend first light , and after a few days of nor west to push the fish into that corner of the bay ……if you use crabs for bait , rip the legs and shell off , and use half crabs ….that way you will cover your bases , that bait is deadly on both fish …..
And , let us know how you get on …….