During the summer - I've had no issues with spooking deer w/cameras BUT - when hunting season starts - the deer tend to look at them in a differenr light - I've seen the decrease in deer traffic after a few pictures were taken "in season" -
I don't put them near my stands anymore after Oct. 1- better safe than sorry.

Funny though -its usually the old does that are STARING right at the camera - they tip off the other deer - the bucks seem to be too into whatever they are doing,