The rapid development of autonomous drone technology has enabled novel applications, such as the surveillance of critical infrastructure. However, how to effectively integrate drone monitoring systems in real-world practice remains an open question. A lack of experience with drones among security and infrastructure experts further necessitates a co-design approach that also informs future end-users of drone possibilities and limitations. In this paper, we present a case study involving personnel from a bio-fuel power plant with limited drone experience through a scenario-driven co-design workshop. We helped participants understand drones’ capabilities through a physical demonstration with multiple drones and supported participants’ generation of ideas and concerns through tangible objects. We outline design considerations and present concrete flight pattern designs that optimise drone resource allocation to alleviate human responsibilities in surveillance and security tasks.