Dive Site Ideas Please

The family is driving to PEI for the first week of September. Actually, we leave Kitchener On to go to the Ontario Fresh Water Freaks Meeting in Kingston Friday the 27th, charter dive, shore dive, dinner, meet and greet, (drink?!) on Saturday the 28th, carry on driving east on Sunday. We have a charter on PEI booked for the Weds evening Sept 1st. So what to do between Sunday and Weds? Shore dive would be best, as we have 4 divers in the family, and charters are just too much $$$. Adults have advanced, kids are ow, with the youngest restricted to 30 ft.

Open to ideas and suggestions. We have not decided if we are going to ferry or bridge across, depends where we dive!

Willing to travel to Cape Breton?
Isn't it a coincidence that I'll be visiting CB in the first two weeks of September
I know couple of excellent dive spots on CB and even Scallop spots