This is what happened to me in a similar situation. Maybe it can help you. When I lived in Orlando, FL I happened to stay close to a retirement community. One day I am running my nitro rigs outside (at the time I owned none that were electric.) I would mainly do street runs, between 12 ish and 8pm as to keep the annoyance to others down to a minimum, and to try to avoid trouble.
I had been running my RCs for months in the same area by this time. An older lady (50s+) came to me and started yelling at me telling me to shut them off and etc. I told her to goto hell and call the cops. I showed her the house i lived in and went to my driveway, and started running my savage. (It was the loudest I owned at that time) The police showed up, and i turned off my rc to speak with them. I told the cop the lady down the street called and he should talk to her first. I then fired my rig back up and started running it while he was talking to the lady to make sure he saw exactly what I was doing.
After speaking with her he came over to me and said she was complaining because the sound startled her birds. I stated that I had no idea why she complained at first, because when she came to talk to me all she did was yell and threaten me with calling the police, and thats why you are here. I told the cop that I didnt mind not running it during certain times or doing what needed to be done so everyone was happy. He told me that since I was running them in a public street that he could ticket me for that, but otherwise I was doing nothing wrong as far as he could see.
We came to an agreement that I would just inform her that I was going to run my RCs for a bit before I did so she could do what she needed to do for her birds. I was happy with this outcome.
(Believe me when i say I look nothing like a good citizen so to speak, I'm all tattooed and pierced) So in the end the lady with the complaint and I were happy. In the future when dealing with police always try to work it out, instead of trying to lock horns with them.
Finally I wanted to add that If you know that the owner of the property also owns the insurance Co, get a letter from them stating you had permission to be there, and that can remove the trespassing charge, as far as the failure to obey a LEO Its a grey area, because they probably didnt record it, and if they did I bet they never specified nitro or electric, If I were you, I would fight it tooth and nail just because. Remember if the officer who issued the ticket fails to show in court its automatically dropped.
This is just my 2 cents on what happened to ya and some advice on how to deal with the same situation in the future.