I lived in New Hampshire for 4 years, and if you're worried about rain, don't...there is NO ass-pocket-deep snow, the rain chases the flies away and it keeps the dust down, but it ain't no monsoon!!! Besides, when people speak of it getting 'cool', they mean the temperature dipped into the 70's...brrrrr!!!!
Hee, hee, hee...better yet, bring a good paperback or two, and get quietly sloshed, then leave them for the locals when you split. They need them, badly!