If your event is more than a day or two away, unwrap the succulents and keep them in a warm, bright place until the event. They need light and should not stay packed in the box or wrapped for shipping for an extended time after arrival.
If your event is more than a week away, in addition to unwrapping your succulents, water them well. Add water until it drains out of the pot’s drainage holes.
Avoid exposing your succulents to temperatures below 50o or over 100o.