dunno if they are open monday but theres a place down 116 towards amherst, Bub's... or wait until you get back up 91 and get off at exit 4-putney- for Curtis' All American BBQ pit- and swing by Liquid Sun while you're at it!
As for other stuff around there, Herms in Greenfield is good, as is Mesa Verde for big cheap high quality burritos and shit, or if you like Thai, there's Blue Ginger, or for sushi, check out China Gourmet. Avoid the Wok at all costs though if you are going to be away from a toilet for a couple hours.
In Brattleboro, the MArina off exit 3 is delish and has riverside seating, and the river view has got a killer rooftop bar overlooking the river. Food is good but dinner prices are outrageous for how slowe the service is.