Don't forget Flume Gorge. Also get up to the top of Cannon Mtn.

If you're in my area, eat breakfast at Parker's Maple Barn in Mason NH. The restaurant is very photogenic. You can then hop over to Potanipo Pond in Brookline where there's some nice photographic opportunities as well (covered foot bridge and swim area).

I'd also suggest you do some photography in the mill yard in Manchester NH and Nashua NH.