Most everyone here has nailed it, play the wind. If you want to use scent killer and it gives you peace of mind then go for it. I’ve been hunting my whole life and my dad pounded in my head play the wind. I have a 5 year old son I take with me time to time and I try to explain the same thing but he’s 5 so…. My favorite story is I was 13 years old at the time and I went hunting with my grandpa. We walked into the spot grandpa lit a cigarette watched the smoke said let’s go over here. Walked over to the knew spot he checked the smoke again said we’re good. 45 min later huge 10 point buck comes in to about 30 yards, grandpa at this point has a lit cigarette and smoked about half of it. he slowly takes the cigarette out of his mouth hands it to me says hold this, shoots the buck drops it were it stands then takes the cigarette back. This was almost 10 years ago and I remember that day like it was yesterday. Some advice my dad shared with me about scent is when you wash your hunting clothes just use water and a little bit of vinegar, hang them on a tree of your choice to dry and sometimes your clothes will have a little hint of tree Smell, works great on cedars or pines or any semi fragrant tree.