The local range used plywood backers that varied from new to ugly large holes.
Everyone that wanted to measure their shots would staple cardboard under their targets.
The cardboard supports the paper for clean round holes with no tearing.
Easy to throw in the trunk till it's used up.

"Camping places fix themselves in your mind as if you had spent long periods of your life in them.
You will remember a curve of your wagon track in the grass of the plain like the features of a friend."
Isak Dinesen