If I were simply talking about ME, (I am insane by the way and totally extreme), I have 20 stands in an area SO I can hunt 5 different stands for example if the wind stays the same direction for 5 days. you obviously don't need (or want) to be nuts like me.
More stands the better, obviously I'd go with 2 over 1, 3 over 2 and so on as long as they are in key spots. Good hunting.