I carry my rods fully rigged, but just disconnected in half instead of 4 pieces (you are ahead of the curve with a 2 piece), and either in rod bag or lately in a plastic mesh sleeve (used for dressing wiring harnesses, but big enough in diameter to stuff a fly rod in). No worries. The rod you are NOT using can be carried in any number of ways as others have suggested, or just placed in a bush or tree or something then picked up later. If theft is a problem then don't take two rods, or stay close. If you want the other rod, then just put the two pieces together and fish. Seems as if you are worried about over complicating a fairly simple thing....