HELP ! Looking for vacation rental for 2013. Spending few days in Boston and then meeting up with family and want property near ocean in either S/E Mass. (near Marion section of coast) or to travel up (by train for us grandparents - by car from New York for rest of family) to another section of coast. Where to start looking for property/agents/information. Started by looking at Maine, nr. Bar Harbor but travel seems too long/expensive.