Hi there, I'm also from Milford NH. This information might be helpful.
Most local club though not really into gliders:
I'm not a member of this club but plan to change that come spring since they have a larger field and are more into gliders and frequently have a winch set up. The down side is they are further away:
You might consider joining the yahoo group granitegliderguiders since there are a lot of locals on it. It's quiet right now but that will change once the spring rolls around and I'm sure if you post people will respond.
Finally I have an unfinished Northeast sailplanes Kestral 100 I'd sell you if you were interested. It's built up but only partly sanded and uncovered. No electronics. Maybe $40 local pick up only.
I also have a Sig Kadet, 80" WS with a really old OS 40 and old Futaba 4ch PCM radio. I've added ailerons to the plane. perhaps $100, local pick up only. I will warn you that if you fly at the www.snhflyingeagles.org
field, this plane only has enough power to climb out of one of the 4 sides of the field (lots of trees around the field).