All they can do is check you for a license, if you are smart you carry a copy of the regs' with you when you fish in this state, when you get threatened with a ticket you just point out the appropriate parts of the book and tell them to have a nice day! I've done it plenty of times when confronted by the fishcops and haven't gotten a ticket yet but I have had them refuse to look at the book while insisting that I was in the wrong at which point I just ignore them.