My typical preference is to arrive at my stand site about an hour before dawn. This usually gives me plenty of time to climb quietly, then get totally set-up and "ready" 15 to 45 minutes BEFORE dawn.
I often have deer come in and bed near me BEFORE dawn, and have killed some mature bucks shortly thereafter, bucks I would have spooked had I arrived maybe only a few minutes later.
I use a green light headlamp, typically switch if over to red light once my stand location comes into view. I climb using red light.
For whatever reasons, deer are not near as "spooky" about an hour before dawn as they will become once you barely perceive it is "getting light" (graying). So long as you're not walking directly towards them, feeding & bedded deer will often just watch you pass by. When you see their eyes in your peripheral light, don't change your gait, don't stare, just keep going.
Typically, there is a lot of animal movement in that hour before dawn, and deer seem "acclimated" to it, in that you can get away with walking noise & movement you at other times will not. I honestly believe deer may relate my activity to a big racoon, arriving at, then climbing a tree, about an hour before dawn.
When I've gone in later, I more often spook deer going in, and see fewer deer on stand.
95% of the time, I will either stay on stand all day (coming out under the same cover of darkness had gone in), or will come out @ 1:00 pm (when most deer are bedded, and the wind is likely to help reduce their hearing or seeing my exit). I have learned there is often a surge of deer movement mid-to late mornings, often related to other hunters walking out @ mid-morning.