We had a pop-up, over 2,000 lbs. dragged with hitch lock, the most expensive one on the market at that time, in place to the street and loaded to a flatbed or so the evidence indicated. It was during the night and we never heard a thing. It was in the desert and parked about 20 feet from where I was sleeping with my "watch" NOT dog.
We now use this: https://www.amazon.com/Reese-Towpowe.../dp/B0016KA9W2
and have for years on different trailers.
I think some of these people have worked doing repossessions and are clever about moving in quietly and existing quietly. This was just north of Tucson, AZ.