The invention provides improved backpack and waist bag carrying systems in which a waist bag rotates through a lower compartment of a backpack to allow the bearer of the backpack to access the contents of the receiver of the waist bag by rotating the waist bag to the front of the bearer's torso. One or more doors are provided in one aspect to secure the receiver of the waist bag in the lower compartment of the backpack but permit the egress of the receiver through the opening covered by the door, which may be tensioned away from the opening by a tensioning system when the free end of the door is released. The receiver is tapered to easily fit into the lower compartment and remain in that compartment due to friction with the walls defining the compartment.