Once a session, each cabin goes on an overnight. So if you are an in-cabin counselor, or someone who adopts a cabin and wants to go, you will be leading an overnight. On an overnight, you will take your campers and hike or canoe them out to an overnight spot, somewhere around the lake. You will take a bag of food, prepped by the overnight staff, and make a fire and cook the food for you and your campers.
Overnights are really fun and you can play games, or use them as a time to help the cabin bond. You will then all sleep out at one of the overnight spots (they all have some shelter) and hike back in the morning.