Hi Kev,
Its been 10 years since I went there, by memory drive north to crystal creek. follow the creek towards the beach on the north side of the creek. When you get near the beach there (by memory) is a track behind the beach. Otherwise you can use the beach. Go north and the next creek you hit is insulator. Can't remember if you can use the beach at high tide. There should be a worn track behind the beach as people launcg tinnies from insulator to get to cattle creek.
Insulator would not worse or better than any other creek in the region, except it may get a little less fishing pressure. Should be some grunter, bream etc... around this time of year.
Kendall