Things to do in Lancaster PA in the fall?

[maslex]

We will be taking a 3 week trip from CT to the mid west come Sept/Oct of next year. And on the way back we'd love to stop in Lancaster for a couple days. We've been there many times before but always during the summer, never the fall time. Is there much to do in Lancaster during the fall? What about leaf peeping? Are the colors nice? Any tips or suggestions would be appreciated. Thanks!