JD
You sure have gotten some good advice here,sure wish forums like this were available in my younger years. Here's few other items that you can also use that I saw were missed. Try remembering them at Christmas time with a card saying thank you. You'd be surprised what a little thank you card will get you. Another thing I do each and every time I walk their property I take a long a chain saw and cut trees that have fallen on there fence lines and clean it up by throwing the wood into the bush. They really do apreciate the things we do to help out and they also act as advertisement to other property owners also by telling them what we as hunters have done for them.
Take Care and God Bless
Youngfart