The Mackintosh Dam Rest Area camping area is past the dam wall, further down the road.
The Montagu Camping Area is a very popular place for fishermen with boats. If your shore based fishing there, you can walk out to the Robbins Passage channel at low tide.
When camping in the Musselroe Bay Camping Area, you should bring your own firewood and use the existing fireplaces. There is a boat launching ramp just up the road in the area if you need it. GPS -40.831987,148.177916