Sounds like to me that you have a pretty good area to hunt out of, It's not to offten that any one is able to sneak up on deer. The fact that there are trails being used, a corn field and thick brush I would say you have more deer than you think.

As another member said the deer are hanging in the thick stuff. Just get in the woods early and use your hunting know how. Just wait untill the cold snap comes on and the rut begins, you'll be glad that you saw those does.

KEEP HUNTING THE GREAT OUTDOORS & GOD ALIVE, PASS IT ON!