With regard to NJ....(I live here and have the pain), whilst CCW is a tempting target there are many many more restrictions liable to sucessful challenge
The arbitrary and painful FID (Firearns Identity) card process
The arbitrary and VERY time consuming Permit to Purchase a pistol
All the nonsensical and arbitrary hangovers of the AWB, muzzle brake not "flash hider", evil adjustable stock banned, 15 round max restriction on magazines, can't buy various types of rifle etc
Each is much easier to poke at than CCW......you eat the elephant one bite at a time, build case law an progressively knock down the more oppressive laws.