Beyond the group briefing, confirm each person understands their specific responsibilities. A one-page assignment, what they own, where to be, who to call, eliminates the “wait, was I supposed to do that?” gaps that cause day-of confusion. Pair newer people with experienced ones where you can, and make sure whoever’s on the trickier roles (check-in, scoring, anything participant-facing) feels genuinely ready, not just assigned. Clarity here is what creates accountability: when everyone knows exactly what’s theirs, nothing falls through the cracks.