Here is my rule:

I hunt the stand the puts the least amount of wind between me and the deer when I am walking in and hunting.

If I am hunting the North side of a lot. The wind is coming from the SW. I hunt NE side and enter from that side. Assuming the deer are bedding in front of the stand. I want to limit my scent as much as possible. If I can have only NE side "tainted" with my scent it leaves all other sections clean. All about % IMO