I'm pretty sure they do have that right. I know of one instance where a game warden looked into a film canister in a drift boat and made an arrest/ticket for pot. This was thrown out of court because the warden was searching the boat for possible poached fish and had no reason to suspect a fish could have been crammed into a film cannister. There was never a question as to the wardens right to search the boat or it's contents that could have held poached fish.