Bar Harbour it is!!
Beloved is quite excited about the whale watching and puffin sighting tours. Puffins! And one of the reviews I read of the KOA said if you're lucky, you'll see the seals frolicking on the private beach at the campground. Seals! Puffins! Ocean views!
So I still know very little about Bar Harbour, but I know enough to bet on it as a great family trip. And I've still got three months to do some research.
Bar Harbour, here we come!