Check out the contocook in Henniker. DO call a regional office, and look up the regs on the NH f&g website, as there are many special regs that apply, esp. after 10/15. Most waters in NH close then. There are, however, many notable exceptions, including the broodstock salmon fishery, which requires an $ 11 permit in addition to your license.

I believe the contocook in Henniker has two or more stretches open post 10/15, with special regs, prob'ly single barbless hook, C&R. I have the reg book, pm me if you want specifics, or check out the F&G website.