Knife laws and bayonet laws

As a gun owner in New Jersey I understand the mess of laws in the state. Now that I own milsurps I'm curious is it lawful to own bayonets not carry just own (of course). If it's legal what about taking them to the range for a photoshoot. Lastly I have a question about carrying a knife mostly as a tool of course I have a Swiss knife and I used that is my tool normally and for my understanding it's under the lawful purpose clause or whatever. I was thinking about getting 3.25 in pocket knife foldable blade not assisted in any way I assume lawful I don't know if anyone's had trouble with carrying knives New Jersey other than the few court cases that's still left the wall kind of vague like New Jersey likes it. I'll probably keep carrying the Swiss pocket knife but I find that the blade may be weak for some things but I do like it's simplistic size mostly everything I would probably need for my basic lifestyle. I'm sure carrying a knife has been debated a lot in this forum before but I haven't seen anything so if you have any links or just want to give me the simple rundown I'm fine with that.