Yes get one even if it comes late you'll want photos. I've already picked out a bunting costume for my baby due October 19th. And my first baby who was born October 17th was a ghost but this one will be a carrot. I'm excited.
How cute.. I definitely wanna get a costume...
You'll be taking a gazillion pictures in that first couple weeks anyway... you'll probably want costume pics even though you're pretty unlikely to be leaving the house in costume. My son was born in March and went home from the hospital in a little bat costume, but we're a little on the silly side.