We need to know what you are doing, so that we know whether or not to continue recruiting. Also, confirm with the agency 72 hours in advance, just to make sure that everything's set up. Confirm with your group. Have your pre-project orientation. Ask the coordinator to conduct an orientation which covers both the agency and the task.
Every action deserves a reaction.
You completed the project as a group, now evaluate it as a group. Gather your members and give them a moment to collect their thoughts. Invite your agency contact to join you. If your host agency is providing snacks, use this time to discuss. You'll be able to reflect, provide closure, and learn more about the agency and its needs through this dicussion.