Dreaming of being in the dark during a trip suggests that you are not confident in what youre doing and that youre ignoring the results of certain actions, which will lead to failure and losses. If during the trip the darkness is suddenly illuminated by the sun, then this announces that in the end all problems will be solved. Dreaming of being in the dark signifies your own disorientation and mental confusion which will result in frustrations on matters that are being handled. If during the dream the darkness is being diminished, this could signify that the problems will start to be resolved as soon as you start to understand them and handling them better.
Read more about dreaming of Darkness in other dream meanings interpretations.