Unfortunatelly I will be staying in DC for day or two ( overnight for sure ).
So far I found this:
Question: How should I transport my firearm in a state I cannot legally carry in?
Answer: When entering a state you cannot legally carry in, if you unload the firearm,
enclose it either in a box or pistol rug and put it in your trunk, you will be legal. Some states
require that you keep the ammo separate from the firearm. If you have a vehicle that does not
have a trunk, put the unloaded firearm in a “Locked Box” and put it behind the seat in a
pickup or all the way in the back of an SUV. See United States Title 18 Part
§ 926A on the Interstate Transportation of Firearms. Some states have specific laws about
transporting firearms. To find info about the laws for a given state click on the state on the
map on the main page and that states page will open with additional info for that state.
and this : http://apps.carryconcealed.net/legal...state-laws.php