This is a group in Andover, MA. I am kind of near you in Bedford NH... but a Southern NH Yorkie meet up just never seemed to happen here.
Try this link
The North Of Boston Yorkshire Terrier Meetup Group (Danvers, MA) - Meetup
I keep saying I'm going to go but I never make it back down here during the week. I work in North Andover but never have my boys with me at work. Its about a 40 min drive so I don't come down on the weekends after doing the drive every weekday. If you do it, let me know how it is!