I personally feel New Hampshire was a bad choice precisely because it was surrounded by leftist States.
The more successful New Hampshire is the more people and business they will draw most likely from neighboring States.
That means a high % of Statist liberals coming for economic reasons but bring with them their leftist politics. It will be more difficult the more successful New Hampshire is.
Of course this is a problem with any state that moves toward liberty but perhaps none more then the relatively tiny state of New Hampshire surrounded by leftist States. Their most significance impact will be to force the other New England States to moderate more then they would otherwise.
I for one do not want New England to moderate, I want them to drive themselves into the ground. Them are Nasty people with a hasty post-revolution history of statism.
Though I agree about New England in general, non-coastal New Hampshire outside north and west of the southeast corner, Vermont outside of the Burlington area, and Maine north and east of the southwest corner are much better. Yet even those areas would be very resistant to a bunch of libertarians trying to move in and take over.
Give the Free State Movement a few years to become frustrated or even downright angry with their choice of New Hampshire and the disenchanted may be willing to move to Wyoming or Alaska.