Just want to hopefully keep this short guys. Game Wardens have more rights than do Police Officers. They can search any car, boat, camper, etc. without probable cause. They can even search your house if there is "reasonable suspicion" that you are in possession of poached goods. Is it right to do this? Hell yes! Those of us that are honest shouldn't even bat an eye at the search, it is for the good and wellfare of our sport. When you buy an airline ticket you are subject to a search and x-ray before boarding the plane. If you refuse, You don't get on the plane. When you drive up to Canada and cross the border you are subject to a search as well as your vehicle. Refuse, and you don't cross the border. Buy a fishing license in Washington and you are subject to searches by Game Wardens. Refuse, and you lose your license.
Remember also, for every 5 polite people the Wardens contact there are 5 more that act like ***holes. Also, we are the eyes and ears of these Game Wardens. So, if you see someone poaching, snagging, etc. Spread the word to them when they are contacting you. Last but not least, if the Warden has a really bad attitude, complain to the State and they may be transfered or disciplined if enough complaints come in.
Also, the Game wardens aren't just limited to boat launches, shorelines, etc. They can stop your vehicle at any time on any highway without a reason. The Game Wardens will have to articulate in court though why they stopped you; so don't worry about it, the stop will be a good one. Hope I shed some light on this topic. Game Wordens and bounty hunters can do just about anything they want.