I will be staying in Cambridge for a week while my son attends a summer fencing camp at MIT. While we plan to walk or use public transportation for Boston sightseeing, I'm not sure if I should rent a car for getting around Cambridge (and to and from the airport). He carries his gear in a golf-sized bag, so although we are staying at the Residence Inn Near the university, I wonder if walking to the Z-Center every morning with it is do-able. Do you think renting a car is necessary / a good idea? Thanks for any advice.