Packing in a dream usually marks a transition already underway -- deciding what to bring forward and what to leave behind as one chapter closes and another opens. Struggling to fit everything into a bag can reflect unfinished business you're not quite ready to set down before you move on.
The Scribe should be asked for manifestation of the hidden, study of mysteries, unfastening of the tongue, circulation of wealth, defamation and transmission of slanders. - Picatrix (Andalusia, ~1000.AD)