I've been thinking about this a bunch lately, but everyone already said all of my answers. If no drum, make sure to mention during safety talk that back row being included with steer during count of capsize drill includes responsibility if the steer falls off, including yelling "Stop the boat" or "Hold hard." If one of them is also a competent steer, discuss them steering to pick up the lost steer, but honestly, unless it's race conditions, that person can prob just swim back (for a drill, not for an emergency, collision with injury, etc.) If losing the drum or steer in the non-motor boat areas (just sailboats for part of it) where we practice, feels a little less risky, so will probably run a drill there at some point. I wonder about describing the procedure for a few practices and then doing a surprise disappearing steer... But that's just because I think it would be fun. I would in reality practice it with everyone knowing it was coming at least twice before surprising them.