First trip to Boston for a couple in mid 60's taking a cruise from there up the coast. Plan to spend 2 days before cruise seeing the sights and drinking in the history of this great city. We are looking for recommendations on public transport from airport to hotel, hotel recommendations within easy walking distance to downtown historic sites and harbor and public transport from hotel to cruiseline pier. Could subway system accomodate those transfers? What should we make a point to see if we like old buildings, history, seafood and the water? Our hotel budget will be stretched I know, looking at downtown hotel costs, but would appreciate recommendations if that's the place to be.