I'll assume you're talking about actually hunting in my answer.
I have seen in excess of 100 deer on late December deer drives when they were herded up. That was 15 to 20 or so years ago when the population here was abnormally high. Actually sitting on a stand, it would be in the 30's somewhere.
My best sit ever(Nov 1, 2012)produced 17 whitetail bucks of at least 2 1/2 years of age and most were 3 1/2. All were within 50 yards at some point, with a number of them inside 10. My buck tag was already filled with a 12 pt and I was out to fill my doe tag. Despite seeing about the same number of does at close range, I didn't fire a shot because the drama before me of bristling, sidling, grunting, snort-wheezing bucks was just too good to spoil. It was a magical evening sit that I'll never forget. I remember getting down from my stand and thinking "If I die right now, I've already been to heaven."