First, I only use scent lok, its been a while since I have read on it but I don't think scentblocker is as effective.
To answer your questions, yes, that is exactly what I do. I do the rest of my clothes in unscented detergent and I push for my wife to do that but she doesn't always listen. I am 100% confident that my system works.
I believe John Eberhart even stated somewhere that he didn't even push his wife to go completely scent free on the dryer but his son Chris had. I can't remember my source so don't quote me on that