Target-wise, this redneck is pretty unsophisticated. I've used targets that I printed myself only for sighting guns in, and have never set foot on a real range. I'm assuming they have rules about what you can use for targets?
I cleared out some space in our woods and we shoot everything from soft steel plates (a steel supplier I do business with lets me take drops from their shear for free) to dangling tennis balls to various water-filled containers. My favorite is still the old aluminum soda can. Explodorama!
Our church collects cans to recycle, and they let me "borrow" a few trash bags full every now and then. I promise to bring them back, albeit with modified shape (the missionaries who get the recycling money have not complained).
At our house, no container gets to the dumpster anymore without first getting the ".22 treatment." You know you have a serious problem when the first thing you think about when buying groceries is, "Does it come in something I can fill with water and shoot?"