Get a tractor with a loader bucket, find a nice hillside, and build yourself a bermed range! I'd keep the firing line with your back facing south, if possible, so the sun shines on the berm and the areas you dig up to keep them dry, and so the sun isn't in your eyes when shooting.

Hell, the place I did my shooting for my CCW permit was on private land, down in a gully behind the house. There were houses all around this place, but they did a helluva lot of shooting down in this gully. Pin matches, CCW training, all kinds of things. Gully was pretty deep though, and had a helluva berm.