At week 19, we decided to go register.  Most people you talk to say it is a disaster and really stressful, but we actually had a great time.  We started kind of early, and we did it when we wanted to do it.  When we got overwhelmed, we took a break.  If it meant we had to go back another time, then we would go back (and we did, many times).  Here is Kelly around 19 weeks when we were out getting some registering done.