Yeah i just have handshake agreements. To be perfectly honest what we do is fun for us, but if done well is a huuugggeeee service for the farmer. If they aren’t into it enough to just allow me to do it, i thank them for their time and dont go back. My farms dont require notice when im coming or going, and they trust me to do what i can for them.
Im not saying you cant find a farm that wants a contract and is worth going to, im just saying, I have not found that. Those folks always have prohibited times and conditions. I want to pest at farms where they offer me a dozen eggs every now and then, or boast about my guns to people who show up while im there and ask for a demo to show off how effective norm and I are. These are the kind of folks i like to work with. I have four amazing farms and a bunch of decent ones I always shoot at the amazing ones first to help them out.
All of that said, I know all neighborhoods arent like mine, but keep in mind i pest in NY and it is arguably the most sue happy state around. But if a farmer has a real issue, and you can make a dent, he/she should welcome you .