OzOne wrote
Surely freedom to carry a weapon interstate is a basic American right

Federal law says one may transport firearms from one jurisdiction where they
are legal to another thru a jurisdiction where possession is restricted
provided certain packaging restrictions are met (eg, unloaded, in a locked
container). Trouble is local law enforcement resents this and will illegally
thwart it if they can.

Example - NJ police stop you and ask it you have guns, drugs, etc. You
admit having a gun properly cased IAW federal law in your trunk. They
demand to see it to record make and serial #. You comply. They hand the gun
back to you then arrest you ... gun is in your hand not in the case!!
Happened to a dude I know. That's why neither I nor my money go near such
states.