Hello,
The vet that I use is Danvers Animal Hospital in Danvers, MA. (My boyfriend lives in Lawrence, North Andover area so I was looking for vets in the Lawrence and New Hampshire area and found them.)
I haven't had to take any of my snakes to the vet for an emergency or anything else serious, but I did check out a few around here and took my BP in for a "check up" to check out the reptile vets they have there.
There are two exotics veterinarians at that clinic and the one that saw my BP seemed like she knew what she was doing, knew what to look for, and seemed to know the basic husbandry for BP's. I didn't have any red alarms going off while I was speaking with her.
I can't vouch for their emergency reptile care as I've never had to use them for that- but for the most part, she seemed to know what she was doing.
Good luck!