To clarify the clarification... I think this refers to people who are housed in "emergency housing" by some agency like FEMA because their regular home is no longer viable (e.g.: burned in a wildfire), and they have not been moved into something more permanent.

This does not refer to people who's only economic choice generally is trailer parks.

There are a portion of trailerparkers who could but choose not to live elsewhere. I don’t necessarily agree with it, but they made the choice.