I've shot hundreds of park deer over the years,maybe not in the thousands,but close. The one thing I can guarantee with park deer is,you know they are going to be there,after that,all bets are off. Why do I say that,it's because even park deer know the crack when they've been shot a couple of times. And what seems like shooting fish in a barrel,becomes quite difficult. I've seen many people turn up to shoot park deer,only to say it's not for them. Why,
because the deer are bunched up,and are consently on the move,therein making even a chest shot really difficult,let alone a head or neck shot.
If you don't have the ability to head or neck shoot,then don't do it.