I audited a New Hunter class that is mandatory in our state and I was surprised at how much stress was placed in the course materials and presentation about navigating public perceptions of hunting, how to approach land owners about permission and even how to deal with neighbors, hikers, joy-riders etc. who confront you while you're hunting.
Dirtguy, a strategy I have recommended to many of my clients who get crosswise with neighbors is to be proactive, to reach out and emphasize how positive the relationship has been and how it could be even better. Permission to hunt a good piece of property is important to you, but the land and neighbors are important to the landowner all year long. Is there anything you can offer to do in the off season that would make his land better at the same time it enhances your hunting lease? E.g., walk and repair the fences and gates, identify and maintain signage, put up wood duck nest boxes and martin houses, cut up trees that have fallen across roads, threaten fences and gates? Are your tree stands visible from neighboring lands or roads? That is a common trigger for neighbor complaints in suburban areas.