My advise is to never bother one while he is doing field work as they are busy and don't appreciate being slowed down. Catch them in their home and offer some labor around their place in exchange for hunting priveledges. I have had 2 farms tied up this way for the last 4 years. I am the only one allowed to hunt. Acreages and farms require a lot of maintenace and it will get you in by offering to help. I would never use the phone as people want to ACTUALLY see who is wanting to be on their land.