1. Your TN permit means nothing in Maryland.
2. You do plan on locking the unloaded gun and ammunition either in an exterior comprartment of the vehicle or in a locked case to separate the unloaded gun and ammunition from the occupants of the vehicle....right?
Q. Can I legally transport firearms interstate? [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman](From the MD State Police) [/FONT][/FONT]A. [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]Yes, under Title 18, Section 926A, of the United States Code, a person who is not prohibited
from possessing, transporting, shipping, or receiving a firearm shall be entitled to transport a firearm for any lawful purpose from any place where he may lawfully possess and carry such firearm to
any place where he may lawfully possess and carry such firearm if, during such transportation the firearm is unloaded, neither the firearm nor any ammunition being transported is readily accessible or is directly accessible from the passenger compartment. In the case the vehicle does not have a
compartment separate from the driver's compartment the firearm or ammunition shall be contained in a locked compartment other than the glove compartment or console. [/FONT][/FONT]