Can't help feeling a Canberra sailor coming down from the ACT to sail in a lake is a bit like taking coals to Newcastle. Had some pretty memorable sails on LBG in a westerly. The downwinders from Blue gum Point to the Hospital peninsular were a blast. And when the wind dropped there was always enough depth for sailors to bob ashore to Poser's Point and huddle together to keep warm.
But Lake Illawarra is warmer and when the windy patches fill in in a westerly they are a lot less gusty. LBG has a few spots where you can find smooth
and deep water. I find the bottom is always of concern in the smooth parts of Lake Illawarra. Plenty of depth out wide though, and out there the swell, having more fetch, is a little more organised than on LBG.
Don't underestimate LBG on a good day. But yes, we only recall the good days. Lake Illawarra has more of them.
( And then there's the coast

, Broulee is closest )