Packing the hospital bag

This is my 3rd baby , but it will be my 1st summer baby. The other 2 where born in the winter. What clothes do I pack for her? Short vests or long? Thick or thin babygrows? Do I even need to pack babygrows? Will she need socks? A hat? It's so hot and I don't want to dress her too warm but I also don't want her to be under dressed. Can't believe it's my 3rd and I'm feeling so clueless! It's either the pregnancy brain or just because with my older 2 it was easier to pack for because it was so damn cold