Registering for Baby Sprinkle

I'm due with my second baby, a boy, on 2/20/16. My daughter just turned two. My aunt wants to throw me a second baby shower (sprinkle) on 1/30/16 ... she did my first shower for my daughter too. We don't need much... just boy things now instead of girl things. Should I still register for gifts? And, if so, should the registry info be printed on the invitation?