Taylor said Camp called her husband in Oklahoma City from the Shamrock Cafe about 5 p.m., and that was the last time the family heard from the three.
They were last seen getting out of a 1983 gray Audi in Chandler, Taylor said.
The Oklahoma State Bureau of Investigation and local authorities have conducted aerial and ground searches for the three but with no luck. Last month the bureau offered a reward of up to $5,000 to help find them.
Wednesday OSBI spokesman Kym Koch said investigators still have no major leads.
Kregear is 5 feet, 4 inches tall, weighs 130 pounds, and has blond hair and blue eyes. She was last seen wearing acid-washed jeans and a yellow and white striped shirt.
Camp is 5 feet, 3 inches tall, weighs 200 pounds and has brown hair and eyes. Camp has multiple sclerosis and walks with a limp.
She was last seen wearing a red sweat shirt and pants and white tennis shoes. Officials fear for her safety because she was not carrying her life-preserving medication.
Britto is 3 feet tall, weighs about 60 pounds and has brown hair and brown eyes. She was last seen wearing a pink sweater, light blue corduroy pants, a blue and black striped shirt and tennis shoes.
Anyone with information should call the OSBI's 24-hour hot line, 1-800-522-8017. BIOG: NAME:Archive ID: 513007