Our family of four (2 adults/2 teens) are travelling to Boston in Aug. to check out colleges and visit the historic sights. Our daughter's primary interest is BU and Boston College. Realize these aren't close to one another. What is a good central area to stay in? Are we better off with a vacation rental or hotel? We are staying 3 nights min. and possibly as many as 5 nights. We looked into a townhouse rental near Tremont Street. Is this a good area? Suggestions are welcome!