Many Variables with this issue
This subject gets kicked around with a lot of people I know. We have some stands that we only hunt late (Once Nov. hits), some we only hunt early (food dissappears) and some we can hunt anytime. Wind is a factor for two reasons: 1 is the obvious, you don't want to let them smell you and 2; is the fact that deer movement is directly proportional to wind direction. There are some stands that the deer will move by during daylight hours only on certain winds. Find those right winds (as long as you can go undetected) and you're golden! Of course, if you don't sit there on a few different winds in the first place, you may not understand what wind is the best for deer movement and/or detection. Then there are the stands where deer show up from every direction. The other factor is your entry/exit route. Are you getting in quick and quiet? or are you bumping deer every time you go in?
I rarely hunt a stand a lot early, let it cool off and then hunt hard late however. Don't really know why, I just don't have any like that.
Good Question Steveo!