I'm coming in a little late but I have a pretty good addition.
This is a story about a trailer my sister and her husband at the time bought. So basically my sister met a guy, had kids (ages around 3-7 at the time of the story), and bought a trailer to put on my mom's land. Weird things kept happening in this trailer. These were the strangest:
The husband was playing video games in the bedroom and he kept hearing laughing coming from the front room. The kids were at my mom's house. After he had enough of the laughter, he decided to go see what was so funny. He comes to the living room to find my sister dead asleep taking a nap. He wakes her and asks her if she was laughing, she is adamant that she was sleeping and was mega groggy from being woken up.
It's bed time for the kids. My sister puts her son, the youngest around age 2 or 3, to sleep. She then puts the older child to sleep but as she's doing the nightly routine, she hears this blood curdling scream from the other room. She runs into the room to find her son kneeling on the ground with his arms out staring at a picture of the Virgin Mary. He's not responding to anything but cannot stop crying bloody murder. She picks him up and takes her to their room and he falls asleep sobbing. In the morning, he has zero recollection of the event and when asked why he was crying, he doesn't remember doing it.
Now fast forward about year. The marriage isn't working out and they end up filling bankruptcy and lose the trailer. The trailer sits on my parents' lot while it goes through the bankruptcy process and winds up being owned by a real estate company. It's been pretty much abandoned for months with no one having access but the RE company. However, since it's my parents' land they continue to maintain the lawn. So one day my mom is cutting the grass and decides to take a smoke break. She pops a squat on the stairs that lead to the front door lights a cig and then mid drag hears something from the trailer. Keep in mind, it's been abandoned for a while. She puts her ear closer and it's fucking laughing again!! She heard goddamn laughing. She drops the cigarette and hauls ass back to her house to tell everyone.
We still aren't sure if the trailer itself was haunted (weird right) or if the land is. Prior to having a trailer on it, it was a crop field.