How would a mum of twins take her bubs out alone, if she's wearing one, how else can the other be moved around?

If u want less bulky and better ways is, a light weight stroller that can recline, and baby wear 1 baby. Rotate it. Sometime when baby carry non-stop, mummy still need to babywear it, so whether pushing a double stroller or not, good to standby a baby carrier.