Deer are crepuscular, not nocturnal. They move every 4-6 hours no matter what but mostly at dusk and dawn. Hunting pressure, noise and and unfamiliar smells are more apt to keep them from being seen than corn.
Like you, I've seen deer and hogs show up at a spincast feeder within minutes of it going off. They know what it is, where it is and when it goes off. Have seen this in Florida, Georgia, Alabama, Texas and 5-6 other states during hunting season or outside of it. They're highly trainable animals.
"Hunting Politics are stupid!" - Farm Hunter
"Bible says you shouldn't put sugar in your cornbread." Dustin, 2013
"Best I can figure 97.365% of the general public is a paint chip eating, mouth breathing, certified dumbass." BCLC, 2020
