For anyone who hasn't sailed at Marion and is a bit daunted, don't be.
Marion lagoon is totally enclosed similar to Cremorne lagoon but much bigger. It is pretty shallow so is great for beginners and intermediate sailors, pretty much you can't go wrong if you're with other sailors.
To get there turn left off the hwy at Copping follow the road into Marion Bay, turn hard right where the road hits the water. 1.7 km past the bend there's a track just before the old cemetry, good spot for rigging, right next to the water.
Always great to try new spots