Love this scene. It's always great when you have access to nice places that only few other people can get to. Well, once in a while.
When my BIL had his 21 foot boat we would launch from Penetang Harbour by the cottage and go out to uninhabited Giants Tomb Island in Georgian Bay with pristine beach and shallow water for hundreds of feet. Perfect for swimming. Same thing with any of the little rocky Canadian Shield islands in the thousand islands area of Georgian Bay/Muskoka.
But, I do admit, it gets boring after a while when you and a couple other boats are the only ones there.
I also did this just south of Myrtle Beach along the inter-coastal. Not islands but stretches of beach along the coast only accessible by boat. Difference is you had to move the anchor every 20 minutes or risk getting caught by the tide.