The screen is made up of 3 48" wide 1" thick corrugated cardboard panels. They are taped together from the front with white tape and velcroed to the fence from the rear. They were free from where I work.
Here are the panels test fitted together
Here are the panels from the rear
This is the final look
The equipment is all kept in the garage. All I drag out is the projector, speakers, and lots of wire