David built the world's largest RV accessory and service business, and owned and operated a large RV park. He revolutionized the marketing of RV aftermarket products and services with customer satisfaction as the guide. His personal philosophy of "No unhappy customers - not one" helped him to change the face of the RV accessory business in America leading many RV dealers to change the way they served their customers with aftermarket supplies. He conceived and developed America's leading firm providing direct mail distribution of RV supplies to the consumer and bringing mass marketing techniques to the RV industry. He originated Camping World University, a school to train RV technicians.