Try to save a couple of stands back for during the season, that way you can pinpoint a bucks travel routes. It sure beats pulling down one stand and putting it in another location. If you do that, it means about twice as much scent in your hunting area. Also, this way if the two stands are in close proximity, you can set them up for the different winds. There is nothing wrong with having your stands hung that early, except that it gives mice and squirrels more time to have their way with your seats. The bonus to doing it that early, is that you can really trim your shooting lanes in full canopy, so you can see exactly where you need to trim. Also, this gives your stand location a full two months to dissapate any scent you put out while hanging stands. Good luck!