Boston Minuteman is a great little place, good for Boston but not so much for the other areas of interest. Normandy Farms as others have said is a great place and mor central than Boston Minuteman. On the Cape, we love Bayview but that is more convienent to the islands etc. Plymouth is most likely the most central taking route 3 north or south to get to where you want to go. Winter Island might be good for Boston but living in the next town over, I would not be caught dead there, old Coast Guard parking lot that they now park RV's on. No sewer or dump station, you need to go to the waste water plant down the road to dump.
Good luck.