I used to spend a good 4 days a week at my hunting grounds, as it was a farm, that I took care of, managed it!
I do think deer got used to me due to all my time there
BUT I truely believe they know the difference between me working about the farm, and when I was hunting them
any pressure you put on deer, makes them smarter I think
even if they are ONLY looking to see where your at
they are LOOKING
if you can NOT spend time in your hunting area, I think that is always the best bet
same as getting in and out without being seen

once deer patteren you
they have the upper hand LOL
better sense's to work with
some times its not avoidable
but I do think the best attack is sneak in and out till you kill!
low profile as possible