Thanks for this trip! I would have added two of my favorites the Florence Griswold Museum in Old Lyme, and the William Chester French museum (in or near Stockbridge and Norman Rockwell Museum). You've given me much more to explore.
Thanks for the tips and the suggestions. I had a great little 3 day road trip checking out all these places, I wouldn't mind doing something similar and adding some new stops.
If I had to pick 2 things, I would suggest Hartford, there you can visit the Wadsworth Atheneum Museum of Art and Twains house (Stowes house is next to Twains). The other stop would be to the Rockwell Museum in Stockbridge. It's a nice town. The Wharton home is about 10 minutes from the museum. Skip Springfield and Amherst. So basically days 1 and 3, without day 2 on my itinerary.