I have had 2 summer bubs and mine lived in short all in ones suits, singlets and shorts/skirts. I avoided dresses because they ride up and are a PIA for newborns. You'll need heaps of large muslin wraps. For night my girls had a short all in one with light pants and were wrapped in a muslin wrap or slightly heavier cotton wrap. Or you could get a some very light long all in ones for night time too.