Good Idea Jon, or maybe do something like this...

Plan a F-T DO around the Classic ballparks thing:

Boston: a do

NYC: around Catman DO Trois (which means it may have to be later in the spring.)

Wrigley: AnnaS, are you listening?

IT can be one event as part of a fun weekend.
That way you don't get all the work and the locals can help out with stuff.

Good luck.