My lo is nearly 8 months now and is HEAVY, so it's time to start thinking about back carries. While she's been on the front I've used a backpack as my change bag/handbag but I don't know what to use when she's on my back. I have seen specialist babywearing bags like onbag but they are way out of my price range Anyone have any cheaper solutions? Also any tips for traveling light? Try as I might not bag always seems full and cloth nappies take up so much room!