Background: Family interventions targeting patients and/or informal caregivers are beneficial, but few have been integrated in oncology clinical care. Understanding diverse stakeholder perspectives may inform implementation and dissemination efforts.; Methods: We are currently conducting a randomized controlled trial of CareSTEPS, a telephone-based intervention for caregivers of advanced lung cancer patients. CareSTEPS seeks to improve caregiver and patient self-care behaviors, quality of life, and satisfaction with care.