Welcome to the forum!
The only advice I can give you is to scout, scout, scout. NH is not the duck capital of the flyway and people work hard to find spots that produce. Hell, I am still looking for more than a few inland spots that will constantly produce for myself.
Be prepared for lots of other hunters in easy to find/get to spots... and even some in the tough to find spots! Think outside the box and make good use of google earth.