Sounds like you need to take a good look at your treestands and try to determine where the deer will be coming from when you sit there. The best strategy for avoiding deer smelling you is to sit downwind from the deer. Of course the deer seem to figure this strategy in reverse and travel into the wind as often as they can, so you have to be a little tricky with stand placement. Almost all of my stands can only be hunted with specific wind directions and either in the am or pm. scout your area and know the prevailing winds. If you can figure out where the deer will be it is just a matter of stand placemet and waiting for the perfect wind. Scent killer is neat stuff that somewhat works, but I have found that it takes a lot more effort to mask/eliminate your scent than it does to just play the wind. Good luck this season and welcome to DHC.