The meaning of Trailer in dream | Dream interpretation
If pulling a trailer you are lugging unnecessary weight.
If riding in one, you are not in control of your life direction. See Passenger.
If living in a mobile home, see House.
To dream of traveling or camping with a trailer to an automobile is a happy augury for men but not for women, A man having this dream may reasonably expect a long period of contentment, while for a woman it predicts the opposite.
Dreams of a trailer signify that you are riding on the coattails of someone else’s energy, getting hitched, and/or realizing that if you hook up with the right person, you can go places. Perhaps this dream is showing you that you have been relying too heavily upon someone else, and it is time for you to take the wheel of your own life, and own it with full responsibility. See Parasite.
A trailer is a home and in this way is ultimately a symbol of your sense of self at the time of the dream.
The function of a trailer is to allow such a home to be mobile and easily moved from one place to another. This movement is symbolic of change and transformation such that the essential self as represented by the trailer is unchanged. Such an image in a dream might indicate that outside circumstances are shifting in your life and there is a desire to maintain a connection to your essential self as you allow those changes to unfold.