Having worked in a pediatric hospital PACU, I can say that parent visitors in PACU does not work out well. First of all, many kids are crying and it is a wild area. Sometimes kids require physical restraint to protect themselves. This is not understood by some parents and can appear to be barbaric if not understood. Many times, children are more cooperative if parents are not present. Of course exceptions are always needed. Having a PACU full of parents would be a nightmare in my experience. Second stage post op is another story.