While the efficacy of cognitive behavior therapy for childhood anxiety disorders, including separation anxiety disorder (SAD), has been established, tailoring such treatments to particular interests and needs may enhance uptake of evidence-based interventions. The current investigation evaluates the feasibility and preliminary efficacy of an intensive, cognitive-behavioral intervention for girls with SAD provided within the novel context of a 1-week camp-like setting, the Child Anxiety Multi-Day Program (CAMP). Twenty-nine female children aged 7–12 with a principal diagnosis of SAD were randomized to immediate CAMP treatment (n = 15) or waitlist (i.e., delayed treatment; n = 14) condition during the course of this randomized controlled trial. Children in the immediate treatment group evidenced significant reductions in SAD severity, functional impairment, and parent report of child anxiety symptoms relative to the waitlist condition. The intervention’s positive therapeutic response suggests one possible delivery model for surmounting difficulties faced in the dissemination of weekly treatments for SAD.