Hospital bag help!

So i live in australia, South East Queensland and I'm due to have my little boy in January, it will be summer and we have extreme heat during summer. This is my first baby, so I have no idea what to pack in my hospital bag. Clothing and wrap wise for him, i don't want to pack anything that will be to warm for him and have him over heat, but I don't want anything to thin and have him being cold!

Who of you live or had a baby in summer (Australian summer) and what baby clothes did you pack in your hospital bag.