Having a C&R in NJ is IMO useless. You can not legally accept firearms from out of state without going through a FFL. You can transfer (as a citizen) long guns only by using the from from the state police. No registration, but if (not that it ever happens) someone questions you about how you acquired that long gun you need to be able to show that form signed by buyer and seller along with your FID.
NOTE: I am not a lawyer and none of this info should be used or confused with legal advice. Seeing as your freedom could be in jeopardy I recommend consulting a lawyer or authority.
Concentrated power is not rendered harmless by the good intentions of those who create it.