One of the most important parts of this retreat is prayer, prayer and more prayer. Prayer is the strong foundation upon which this entire evangelization process is built and cannot be stressed enough. Fortunately, in our Catholic faith we have an arsenal of prayer choices -- Mass, rosary, novenas, fasting, adoration, etc. -- to draw from.
The Retreat Coordinator and Main Evangelizer should have already secured these.
Start recruiting people to adore during the retreat. Get lists of past retreatants from the Retreat Coordinator. Adoration occurs only on Saturday and Sunday. It does not continue through the night, but it can begin and end whenever you decide. It can be held during confessions on Saturday, but it should not be held during the Consecration Liturgy on Sunday.
Check in with all your volunteers to confirm that they are on-board and ready to go.