this section seems appropriate:
2C:39-6. f. Nothing in subsections b., c. and d. of N.J.S.2C:39-5
shall be construed to prevent... (2) A person carrying a firearm
or knife in the woods or fields or upon the waters of this State
for the purpose of hunting, target practice or fishing, provided
that the firearm or knife is legal and appropriate for hunting
or fishing purposes in this State and he has in his possession
a valid hunting license, or, with respect to fresh water fishing,
a valid fishing license;
the 'palm' rule, i have only seen that here on the forums, is not law anywhere i know of. im not sure where this comes from. states or cities with restrictions on blade length will give the exact measurement, ie 3", 3.5", ETC.