Maine, New Hampshire, and Vermont have some of the lowest crime rates in the country, and the odds of being a victim of a crime during your visit here are slight, but all travelers are advised to take the usual precautions against theft, robbery, and assault.
Avoid carrying valuables with you on the street, and keep expensive cameras or electronic equipment bagged up or covered when not in use. If you're using a map, try to consult it inconspicuously -- or better yet, study it before you leave your room. Hold onto your pocketbook, and place your billfold in an inside pocket. In theaters, restaurants, and other public places, keep your possessions in sight.
Always lock your room door -- don't assume that once you're inside the hotel you are safe and no longer need to be aware of your surroundings. Hotels are open to the public, and in a large hotel, security may not be able to screen everyone who enters.
Park in well-lit and well-traveled areas whenever possible. Always keep your car doors locked, whether the vehicle is attended or unattended. Never leave any packages or valuables in sight. If someone attempts to rob you or steal your car, don't try to resist the thief/carjacker. Report the incident to the police department immediately by calling tel. 911.