Set Filming Conditions for a Busy Repair Session

You coordinate the Fixwell Repair Circle at a neighbourhood hall. Student filmmaker Tessa Morin requests unrestricted filming at Saturday's session, from 1 to 4 p.m., for a local-interest project. Publicity could attract volunteers, but several regular visitors have asked to stay off camera. Only three repair volunteers are available, and one is willing to demonstrate on camera. A side room is free from 3 to 3:20 p.m.; using it would temporarily leave two volunteers with visitors. The hall must be cleared by 4:30 p.m., with the final half-hour needed for tidying.