Barkers Creek Reservoir is a stocked fishing location annualy receiving Brown Trout, Murray Cod and Golden Perch. The reservoir is currently only 42% full.
Maybe that's why I didn't get a bite. Next time I might take the kayak.
Habitat and Map - https://vfa.vic.gov.au/recreational-fishing/recreational-fishing-grants-program/completed-project-pages/installing-woody-habitat-into-barkers-creek-reservoir