He called the NJ State Police last Friday and was transfered to the CW department. He told them about his situation and told them 3 times that he would be staying overnight (for one night). This is what they told him: As a non-res with a permit covering his starting and ending destination, he could bring his weapon through the state as long as it was unloaded and locked in a case with the ammo locked up seperate and as far away from the driver as possible (in his motorhome). He asked 3 times about staying overnight and they continued to tell him he would be ok as long as he followed the instructions listed above. They also said that if for any reason he was stopped, to be SURE to inform the LEO at once and be sure to show ALL permits and have his bill of sale.
I know this is not what I've been hearing but just wanted to pass along what they told him. He even said they were very friendly. I just wish he would have thought about recording the call.