Have you spoken with your local game warden?A conversation would be in order,maybe they are closing in on these poachers.Maybe you could help them set up a sting.You are not required to provide your name when calling the poaching hotlines.
I do agree that you should follow your dads wishes though.Your relationship with him is more important than your disdain for the poachers.Hopefully with the property for sale with a little patience they will no longer be an issue.Hopefully they move very far away!
I hate poachers,they steal from all of us who go about it the right way!Most game departments are under funded.Our local game warden is a client of mine and he has told me straight out that he cannot get over time to do an after hours sting.They are spread way to thin and can't get over time to be in the field when they need to the most.
How can you be effective under those circumstances?