1. Intake lanes
Estimate how many cars will arrive in the busiest half hour and how long one drop-off takes at your venue. Divide to see how many cars each lane can take per minute, and open enough lanes that cars do not queue onto the road.
2. Park by departure
Put guests likely to leave early, including elderly guests and VIPs, closest to the exit. Park the main crowd further in.
3. Spread out the departure rush
When the event ends, many guests walk to the valet desk at once. If they can request their car from the hall and wait inside until it is ready, the porch stays clear and drivers work through requests in order.