The family moved to Plainfield, Iowa, in 1970, where Llew worked as pastor in the local Baptist Church, TBC, and served on the municipal council. When Walker was ten years old, the family moved to Delavan, Wisconsin, where his father continued to work as a minister, at the First Baptist Church of Delavan. In 1985, when Walker was in high school, he attended and represented Wisconsin at two weeks of American Legion-sponsored training in leadership and government at Badger Boys State in Wisconsin and Boys Nation in Washington, D.C. While at the event, he met President Ronald Reagan and had a photo taken with him. Walker has credited the experience with solidifying his interest in public service and giving him the "political bug". He attained the highest rank, Eagle Scout, in the Boy Scouts of America, and graduated from Delavan-Darien High School in 1986.