Some Free-Staters (again, not all) actually have been working hard on the notion of State Sovereignty; see the FSP page on this topic.
Also, a new bill has been introduced this session:
HCR19 - Affirming States' powers based on the Constitution for the United States and the Constitution of New Hampshire.
There are also a few bills in play this session asserting the NH manufacturing shall not be regulated by the federal government. Longshots? Well, with over a dozen Free-Staters elected to the NH House of Representatives, maybe less long-shot than in other states....
Or even http://www.nhliberty.org/bills/view/2011/HB324 which is having a hearing today.
AN ACT relative to lawful commerce in goods and services sold, made, and retained in the state of New Hampshire.