Check out https://cassidyinview.wordpress.com/by-topic/conference-pedagogy-and-planning/conference-task-list/ for a list of conference tasks (so you can ask individuals, be they volunteers or staff, and form committees for larger tasks).
This and other material on the Conference pedagogy link is found in a book, for which I wrote or co-wrote 4 chapters:
Learning from Academic Conferences. May, 2018.
Series/subseries: Critical Issues in the Future of Learning and Teaching (CIFL<https://brill.com/view/serial/CIFL>)
Pages: xvi, 180 pp.
ISBN: 978-90-04-37299-3 (Paperback), 978-90-04-37300-6 (Hardback)
E-ISBN: 978-90-04-37301-3 (E-book)