We are 2 adult couples traveling to Maine and spending 1 1/2 days in Boston at the end of September. We will be arriving late morning or early afternoon on Thursday and flying out late morning Saturday. We were thinking of going to Harvard, doing a tour of the Freedom Trail and a Duck Boat Tour, which my friend has her heart set on. Is this all doable in the time frame we have? Any hotel suggestions are helpful. We are looking for a moderately priced hotel. Thank you.