New Hampshire is an open carry state and it is not uncommon. However, a permit is required in order to possess a loaded handgun in a vehicle, regardless of whether or not it is visible or concealed.
TRANSPORT- Keep your unloaded firearm separate from your ammunition and locked in a compartment or trunk ~ Optional cable or trigger lock. Alternatively keep it on your front seat unloaded with the action open with no magazine ~ magazines should be empty and separated. Nothing in the glove box