To dream of a backpack represents self-sufficiency. An area of your life where you are doing something on your own. It may also reflect problems that you have to deal with all by yourself. Doing your own thing.
may also represent hopes, desires, and secrets that you don’t wish to tell anyone about.
Example: A woman dreamed of hiding a laptop in her . In real life she was making plans to see a concert that her boyfriend didn’t want to see. The backpack reflects her willingness to “go it alone” and make plans for the concert anyway.