Posted: Today at 16:26
Sounds OK if that's where the subway stops are SS.
Bag drop used to be at the start, but last time I did it was 9 years ago and security will have changed for obvious reasons. Just don't plan on taking anything with you on race day that you can't either run with or discard.
Boston at the weekend? Apart from the expo, there'll be a baseball game on the Saturday, city walk & general sightseeing, the 5K (not cheap, but lots do it), shopping, lunch in Faneuil Hall, another trip to the expo, pre-race dinner....