I loved Nova Scotia and PEI -- but I wasn't pulling an Oliver, I was camping in a tent and hauling my touring bike around with me so I could ride on trails and small roads.
I would recommend going to both islands, and I would allow more than a month because there is so much to see and do there. There is a lot of great history, interesting buildings, beautiful landscapes, local music and boat building. I hope you give us an update after your trip!