How to let volunteers check in to a Check-Ins event without printing a name tag, while still tracking child-to-volunteer ratios

Answer

On the event's Labels & Locations tab, edit the name label and uncheck the Volunteer check-in type so no badge prints for volunteers. They still need to be checking in as Volunteer (first time at a manned station, or use the Services integration). The ratio filter she already set on the location handles the alerting — the location stops accepting more regular/guest check-ins once the threshold is hit.