I'm not exactly sure what they call it at BB, but at TL we have "Safe Harbor" which is an area right outside Singapore Sal's (the big store).
If a misplaced child is found they are brought there and kept under supervision and their description is radioed to all lifeguards and staff. If parents come to a lifeguard and the child has been found they are escorted to Safe Harbor to be reunited with the child.
If a parent cannot find their child they will go to Safe Harbor and describe the child. Again, we will radio a description to lifeguards and staff along with the child's name and they will keep an eye out for the child.
We have had days with over 40 children and parents being misplaced.
Thursday I was covering SH for about 45 minutes and luckily the only customer I had was a woman looking for her 17 year old twin daughters. In her sitauation nothing was really done, as I asked her did she really want the lifeguards and others searching for lost 17 year olds, and if yes what would the kids have to say about it.
But also we will not let an unaccompanied child out the gate by themselves. Last year I stopped a six year old boy who had wandered away from his parents; I took him to SH and the parents were located.
So if she wanders away there is a method where we can assist you in fnding her. By the way, one thing that is always useful if you have children who may wander at the parks, and you have a digital camera, take a photo as to how they are dressed so you can show people.