I look at this way!
My dad taught me to work hard - and so I did. He took me as did my Grandpa both hunting and fishing.
I no longer have either but do have my own grandkids to which I will take and teach what was taught me of our grand outdoors. I will pass the tradition on as both my Dad and Grand dad would want me to do.
I understand the tresspassing and how it upsets you - would be the same with me if I owned what you do. When the authroities do nothing - then start calling the Chief or better yet higher authorities. That is not right and they could be arrested.
Tesspassing hurts all ethical hunters.......
I for one wold love to hunt some flooded fields - I hunt alot on lake Michigan but out there I can't use my dogs.......
Good luck this year
JW