I am not sure what the workshops are worth. The darkrooms at nesop are OK, the last time i was there was 2006.
I tought a continuing ed class at SMFA back then that was actually very good. I know they have since changed their darkroom facilities, but in any case, the resources there will be by far better, and i think that for the same money you will get more knowledge based education, but then again, i have no knowledge of the actual workshops at nesop.

La Pete is a place to check out as well, as noted above.

BTW - after you have processed your films and want to digitize them or print them with ink - a cool place called Aviary gallery, in Jamaica Plain, no offers a pretty impressive digital lab setup for rent.

Another place to check is if Umass lowell has any photo workshops, that would be closer to your area.