I use all of the above MossyOak02 ,
and I have seen far more deer since doing so . I wear a surplus Army MOPP suit , spray all of my outerwear with Deer Dander , and hang HS discs for cover/attractant . Yes , I think they help , though I wouldn't call any of them absolute protection . When you consider the sensory gear the deer has to detect you with , it's fair to say that they at least keep your own smell to a minimum .