Mt. Desert is awesome (and unfortunately very crowded during summer)! I lived very near there for several years on two separate occasions, once in Ellsworth when very young and second time in Surry after college. I spent a lot of time on the island. Try to fit in Asticou Thuya Gardens if you can. I'd rate it as the best place on the island.
“Spencer Tunick criticises Woolworths’ refusal to allow mass nudity on rooftop carpark”