Will be coming into North Station on Amtrak Downeaster. How should we two folks get to South Station or Back Bay station to get connecting Amtrak to NYC? Which station is prefered? One traveler is elderly and really can't tolerate stairs, so would that eliminate any local subway connection? How much is the subway (if available)? Or should we just take a taxi? Where would we get the taxi and how much should we be charged? And how far would be going, in order to know when to book the connection?
Thanks so much!