related thread from last year might be helpful…
As others have said, your destinations are kinda all over , geographically (Campobello is just as far away as Newport). Maine is a huge state. What sorts of things do you like? Eating out? In the fall, it can be really hard to find reasonable hotel rooms. If you like uncrowded historic sites, and are in NH, you can do things like the Franklin Pierce house on the way to other places. North Conway is always crowded, the Kanc is generally slow going, but the Kanc is about as pretty as you can get. Stop at the Flume, or the Basin, or for truly less crowded, see if Madison Boulder is open (sometimes the road is closed because of wet weather). Those are my family’s favorites.
The Adams house is in Boston proper, you could see that before you head north? People will recommend various Maine towns but we love Bath, where the Maritime Museum is. Imho only, Acadia is a lot of work, and in the end, the Maine coast is gorgeous everywhere. You needn’t wade through all the people from away in order to see it properly. Have fun!