I am an "idea man", so here goes: offer the park manager to help build a community garden for veggies and fruit trees, maybe add an insect hotel, kids love being a part of all that. Give the people there something to come together on and maybe it will help gain yourself enough exposure as a guy who cares about his neighbors (not saying you don't already) that maybe they just flat out leave your stuff alone and give you a ton of respect for helping better their lives. I always want to win the lottery so I can buy up little lots in rough parts of towns and hire someone to kind of tend to it and just make the produce free for anyone, homeless and impoverished get first dibs of course.