Here's what i do. Get 2 pieces of rebar, some zip straps, and cardboard or whatever for tgts. Attach the cardboard to the rebar "spikes" with the zips, pound into the ground, and u're covered. Want a bigger tgt.? Use electrical conduit for attaching the tgts. to, and use the rebar to slide the conduit onto, once theyr'e pounded into the ground.