The TP&W has some great no hunting signs available through "Operation Game Thief". I believe they cost about $11.00 per sign. They are expensive but nothing like helping to support the guys who will be looking into your problem for you. The sign states the fines for poaching on them also. Can't say "They didn't know" if it's on a sign in front of them.
What about getting a fishery liscense?
This increases the fines and your claim as well.
Also, I carry a camera with me just in case so I can take the photo of the poacher in the act from a distance and place the camera in the truck. Then ask them off the place. Wonder if the law would keep a file on evidence like this even if you did not want to press charges just in case there is retalliation?