If you can find a farmer that picks corn instead of shelling it, try and buy some from him. You'll find that ear corn will last for weeks without molding, as opposed to shell corn on the ground, which after a rain or a couple of days is only racoon food anyway. Plus, as my scientific studies...
I get my corn directly from the elevator. $2.23 last week for 55 lb. bag (bushel). I go out to the chute, open up my bags and let it run in. Low moisture (5 - 7%) content and fresh. I then take it home and fill my feeder and seal it up.
Then, I watch the action as usually within 10 minutes...
Whatever it is, it's most likely lived a very underprivileged life with absolutely no opportunities handed to it and will forever suffer from bad parenting and the failure of the government to provide for its every need!
These are by far the best and easiest out cameras out there, and believe me, I've been though a lot of cameras over the years.
http://www.primos.com/products/game-cameras/proof-cam-03/
http://www.theoutdoorstrader.com/threads/yes-im-a-dedicated-bow-hunter.1312470/
$14.99 at Harbor Freight. Be sure and put a piece of black tape over the little red light on the sensor. They'll never see it.
As far as the trail camera goes, mount it to the tire and be sure to use one that has no flash. Isn't there a place to mount one where they won't see it?
Bow hunt them! Never shoot one that is in FRONT of the others. You'll be able to stick 2 or 3 of them before they even know you're there. Use a fast bow, but don't use any mechanical tips.
Good Luck!