Specifically the weekend before the primary through Tuesday January 8th. This will be when the fun really happens and we all party hardy.
If you are planning to come up it is better to contact the campaign first.
This is the volunteer page but I would skip it and call instead
http://hillaryclinton.com/hq/newhampshire/volunteer/I would call the Manchester State HQ
http://hillaryclinton.com/hq/newhampshire/contact/ and ask for the volunteer coordinator and tell them NH sent you.
Or my personal favorite idea is to help us in the Southern triangle by calling the Salem/Derry/Londonderry office (Katie Sullivan)
Salem/Derry/Londonderry
15 Ermer Road
Unit 101
Salem, NH 03079
Phone: 603-685-3753
Other offices
State Headquarters
34 Fir Street
Manchester, NH 03101-1230
Phone: 603-782-4640
Fax: 603-634-4450
Directions
Berlin
83 Main Street
Berlin, NH 03570
Phone: 603-326-6184
Directions
Claremont
24 Opera House Square
2nd Floor
2W1-2W4a
Claremont, NH 03743
Phone: 603-768-1713
Directions
Concord
24 Hammond Street
Concord, NH 03301
Phone: 603-965-2500
Directions
Conway
8 Washington Street
Conway, NH 03818
Phone: 603-965-2442
Directions
Dover
11 Chestnut Street
Dover, NH 03820
Phone: 603-965-2442
Directions
Keene
180 Emerald Street
Suite 215-219
Keene, NH 03431
Phone: 603-499-4735
Directions
Laconia
549 Main Street
Laconia, NH 03246
Phone: 603-276-3438
Directions
Lebanon
45 Hanover Street
Lebanon, NH 03766
Phone: 603-276-3933
Directions
Littleton
262 Cottage Street
Suite H
Littleton, NH 03561
Phone: 603-289-4875
Directions
Nashua
23 Elm Street
Unit A
Nashua, NH 03060
Phone: 603-294-4746
Directions
Peterborough
174 Concord Street
Suite 210-220
Peterborough, NH 03458
Directions
Plymouth
42 Main Street
Plymouth, NH 03264
Phone: 603-685-3754
Directions
Portsmouth
30 Mirona Road Ext.
Portsmouth, NH 03801
Phone: 603-294-4411
Directions
Rochester
28 N. Main Street
Rochester, NH 03867
Phone: 603-782-4662
Directions
Salem/Derry/Londonderry
15 Ermer Road
Unit 101
Salem, NH 03079
Phone: 603-685-3753
Directions
Use the contacts web page for directions etc.