This is why people shouldn't read these threads and take advice of people who comment on them.
No where in the 4th Amendment of the United States Constitution is there are carveout for wardens to search a vehicle, a backpack or your person because you were hunting/fishing. Wardens could search your vehicle with PROBABLE CAUSE since it is moveable or if you give them consent. Your tent, cooler, or containers they would need a warrant signed by judge or consent. Searching a person would require a warrant or consent. Obviously they could pat you down for safety reasons without going into your pockets. They could go into your pockets without a warrant, but they better damn good reason, i.e. knife, pistol, 15 squishy things that felt like fish in a 6 fish limit lake.
There is no such things as "Prima Facia laws." There is such a thing called Prima Facie evidence.