I thought States must comply with Federal Transport laws? I saw another post where someone was saying NY doesn't comply.

This only makes sense that States must comply.

Here's a potential sceanrio. I am considering buying a NJ Shore House.

So if I am a PA Resident with a LTCF and I buy a shore house in NJ, I cannot tranport in a locked container through NJ to have the gun in a NJ home that I own? Granted it's a vacation home so I'm not a year round resident.