Funny, most of my family (that are still above ground) have been hunting since the 1950's. Back then, jeans and flannel, maybe wool if necessary. As the years went by, we started buying camo at army surplus stores, now we buy it wherever it's on sale.
Other rules we break: We don't wash with UV blockers, my uncle's a smoker, and did I mention that we rarely glass...my family is old school, they track deer, so we find a suitable track as soon as were able to see and follow it until we find the deer, so that eliminates the idea of us playing the wind because we go where the tracks go. I myself am a greenhorn, but the elders in my family have plenty of bone on the wall to prove their tracking skills have paid off.
Bottom line, equipment can never hurt, following the basic principles of hunting likely make a greater difference, but nothing helps out like persistence and a little bit of luck!