This one ought to stir the pot a bit.
Let's say you've just finished dipnetting, properly recorded your catch on your permit, and all the tails are properly clipped. Fish are all stored away in closed coolers. You head upriver, and as you pull into the dock, several miles upriver from the fishing area, a trooper asks to see your license, dipnet permit, and today's catch.
Do you comply? Do you really have to? Doesn't probable cause apply for you to really have to respond to his inquiry? And how would he have probable cause to believe you have done anything wrong?
To really make the discussion interesting, let's assume the same set of facts, except for the fact that you DIDN'T RECORD THE CATCH, and you DIDN'T CLIP THE TAILS? Again, do you comply? Do you really have to? Doesn't the officer have to have probable cause to initiate a search?