The deer around these parts don't spend winters where the spend early season, but you can scout anytime of the year. Our deer tend to spend their winter's on the south-facing portions of the mountains here, and in the thick areas that provide browse and subsequent warmth.
In September they tend to seek out the windward slopes, and creek bottoms. I like to take a few trips through my hunting area during spring and late summer, but try not to stink it up too much.
I don't hang stands so don't worry about sudden changes in habits...I can adapt to that.
We don't have big midwestern whitetails here, but our bucks are getting bigger. You won't catch them (Pa. bucks) crossing fields in broad daylight unless they are pushed, so the best stands are fairly deep in the woods.