A friend of mine from college and the army came up with a good method. A lot of our shooting was done in borrow pits. (places were dirt was removed for fill)
He attached chicken wire between two T post. We rolled it up for transport. When we reached our shooting site, we simply unrolled the wire and post. We would then push the post into the ground.
To attach the target we used clothes pins sufficient to hold the targets on the frame.
I currently use this system on my range here in Eastern Ar. It is a very windy location. I tried wood backing and staples but the winds ripped the targets off. The clothes pens and chicken wire holds the targets.