Ms. Campbell was born on April 18, 1931, in Cuba City, Wis. Her parents, Frank Churchill Florine, a pharmacist, and Irene (Bower) Florine ran Florine and Son’s Drugstore and Pharmacy, where their daughter worked as a soda jerk. After earning undergraduate and masters degrees in English at the University of Wisconsin, she joined the Marines because, she said later, she wanted to see if she could handle it.