BTW, it was 1981, not 1991. I still have the PotC souvenir to prove it. 
As to the girl, she was one of the many tour guides in Disneyland at the time. If I remember correctly she was in several of Walt's show when they were at Disneyland. Julie Reems is her name. Below is a clip where she is with Walt.
http://www.youtube.com/watch?v=NgsA3v56gGg&feature=related
This is one that I experienced first on the Wide World of Disney, then had the pleasure of riding in the early years. My Mom even liked it! She hated most of the rides (Dumbo and Peter Pan was an exception), she acquainted this with her New Orleans area upbringing.
Congrats to a great ride!
In my mind, Disneyland's Pirates of the Caribbean is the quintessential Disney attraction. I still remember fondly when my brother and I were leaving Disneyland after a day of fun, way back in 1991, when our parents asked: "What was your favorite ride?" We both responded simultaneously, "Pirates!"
Oh yeah... a masterpiece if ever there was one. And a credit to the timeless genius of Walt Disney, Marc Davis, and WED Enterprises.