i would like to know, how useful are the various sorts of nappy bags? The compartments look good, but i'm worried then i would load them all up and end up with heavy bag (bad back i must consider). If you got desperate, could i use a beach bag (waterproof material lining). We're looking at lightweight prams/strollers (5 - 6 kg) and apparently you can't put the nappy bag in the storage basket when you have a newborn, or put the nappy bag on the handles (will tip the stroller over). What to do. What worked for YOU?