Scent killer soap and spray is all I ever use.
I have had deer walk past me while I sat on the ground with cheap camo, and just scent killer spray on, and they were,...I swear to God, no more than SIX INCHES from me without detecting me.
I am not sure if their sense of smell was working or what. I did manage to shoot one though.
However, using the same smell control method, I have had deer wind me and know I was out in the woods and take off.
So what will work? for me its no gas station stops, I don't smoke, I wear rubber boots, and usually a shower before I go out hunting using the scent killer soap, also.. scent killer spray on truck seats and floor mat, and scent killer sprayed over everything when I get to my hunting spot.
As far as scent lok clothes, I never used them and I probably never will.. I feel its just too expensive for me and from what I read.. who knows if it even works.
And truthfully I can not ever see spending so much money on these clothing items just to make Bill Jordan and the others selling their clothing, and licensing their camo patterns millions.
I'll continue shooting a deer or two per year without scent lok, it will not make a difference to me, except in my bank account.