This is a really mean
prank so be careful who you do it to.
That friend has to be pretty forgiving.....
When I was in college we saved newspapers for 3 weeks and then went out at 4 AM and crinkled them up and loaded my roommates car.
Oh, some other places...
Supply closet at school.
A tent on a group camping trip.
Confessional at church.
Restroom at work.
Kitchen Cabinets.
Coat closet.
Boat cabin.
Dressing room at JC Penny's.
Beekeepers' Honey house.