StuckInMA is correct . Each state has their own laws regarding transportation of firearms etc. The federal law DOES NOT supersede state law . I actually called ATF to verify this (I to am going to be traveling through multiple states) .
The FOPA is Federal law, and it very much DOES supercede state laws. In fact, it says so right in the text of the law.
Here is the actual law:
TITLE 18--CRIMES AND CRIMINAL PROCEDURE
PART I--CRIMES
CHAPTER 44--FIREARMS
Sec. 926A. Interstate transportation of firearms
Notwithstanding any other provision of any law or any rule or
regulation of a State or any political subdivision thereof, any person
who is not otherwise prohibited by this chapter from 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 other place where he may lawfully
possess and carry such firearm if, during such transportation the
firearm is unloaded, and neither the firearm nor any ammunition being
transported is readily accessible or is directly accessible from the
passenger compartment of such transporting vehicle: Provided, That in
the case of a vehicle without a compartment separate from the driver's
compartment the firearm or ammunition shall be contained in a locked
container other than the glove compartment or console.
http://frwebgate.access.gpo.gov/cgi-...ite:+18USC926A
(I added the bold face to emphasize this part as a response to a question in this thread)
New Jersey has incorporated the same provisions in their laws and NJ state troopers are pretty cool with it. Local and county LEOs in NJ are not necessarily up to speed. Avoid NYC -- do NOT take I-95 through the big apple, go around it. NYC does not think they are subject to Federal law and they'll arrest people for having guns even if they know you're covered by the FOPA. They just like to make life miserable, on the assumption that doing so will chase away those who carry guns. (They're right.)
Massachusetts has laws even more strict than NJ but again, the state troopers seem to be with the program. County and local will be very "iffy."
Connecticut also has a FOPA-like provision in its laws, so again the state troopers should be no problem but don't count on the locals to know what the law says.
Technically, if you have a car with a trunk the law doesn't require the locked case. That only applies to a vehicle without a trunk. However, it doesn't hury to play safe, and I like the suggestion to lock the firearms in a tool box rather than a
gun case to avoid attracting unwanted attention.