RE: Food Plot For Mule Deer
My first thought was, "Do the regs there allow food plots?" The Game Warden might consider that putting in a food plotwould bebaiting.
If baiting big game in your area is legal, then you can't go wrong with corn.
I get the impression you'd be putting it in a fairly arid climate. If so, then I'd go with a mix of small grains like alfalfa, wheat, and sorghum.
Also pay close attention to where you put it. Small openings in the trees is good because it allows cover nearby.
I wouldn't make several small ones, rather than one big.