My husband and I spent a week in Maine this past September, but we did not do a tour. We rented a house on Mt. Dessert Island, just outside of Bar Harbor. We brought our touring bikes and rode a couple of days along Acadia National Park's carriage roads (which are fantastic and traffic free). We also spent another day just riding around the island. We kayaked a couple of additonal days (sea kayaking with a tour and lake kayaking on our own with rented kayaks), and we hiked another couple of days. If your husband is not much of a cyclist, perhaps you should consider something like that, i.e., having a base where you can participate in a variety of activities including, but not limited to, cycling. While we were there we ran into a group of cyclists from VBT who were touring the area by bike. After talking to a couple of them about their itinerary and seeing them on the road near our rental house, I would have bored to tears. It just looked like a really slow moving group with too many inexperienced riders for my taste. I'd be afraid that whatever may be your speed may not be your husband's.
We really like the area, especially since the worst of the main tourist season was over. Our house rental was awesome. If you want any more information, let me know. There are several places to rent bikes in Bar Harbor, although we were glad that we brought our own.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher