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.
First, ask the Retreat Coordinator for a copy of the updated schedule. Then start recruiting people to help with meal times on the retreat. Start recruiting past retreatants first. You can get a list of past retreatants from the Retreat Coordinator.
Check in with all your volunteers to confirm that they are on-board and ready to go.
Purchase food, supplies, etc.