Various implementations include a bag organizer system that includes at least one pocket disposed within a bag cavity and is coupled to a fixed surface within the bag cavity. The pocket includes at least one pocket side wall having a first edge and a second edge opposite the first edge along a longitudinal axis of the pocket. The first and second edges of the pocket side wall at least partially define an opening to a pocket cavity defined by the pocket side wall and a closed end of the pocket cavity, respectively. The pocket is expandable and collapsible, and the pocket is coupled to the fixed surface by a single seam extending substantially parallel to the longitudinal axis of the pocket, and the closed end of the pocket is not coupled to the fixed surface such that the pocket is hingedly coupled to the fixed surface via the single seam.