We were given hats that were made out of styrofoam cups with yarn attached to them so that we could tie them to our heads. Each cup was decorated by our big sister, and she made an identical one for herself which she wore. We had to look at our cup and remember its design because, once it was tied to our heads, we couldn't look at it again.
We were then given black trash bags that we wore like a poncho with our heads sticking out of a hole at the top. The bags were decorated with a "P" signifying "pledge" (this was back before it was un-PC to call new members "pledges). Our big sisters wore white trash bags with an "S" signifying "sister" on it. When you put us together, we were supposed to be Salt and Pepper Shakers with our hats being the spout!
After getting dressed, we pledges were sent on a scavenger hunt around the campsite (we did this on our annual retreat to a national park), and we found various clues from our big sisters that directed us from one spot to another. We finally ended up in the recreation cabin. Our big sisters were all lined up at the end of the room, and we had to find them based on the clues they had written for the scavenger hunt and the hats they had decorated.
It was so much fun!