Unless you're hunting birds you can wear anything you want.
What humans see.
What animals see.
I don't bother with face masks anymore, and the weather was so hot out west in Sept. that I didn't even wear my wool plaids. Movement is key. Move when they are looking, you WILL be busted. Same with cover scents. If the wind is wrong, no matter what you have on, and they get downwind, it's usually over. And I know, everyone has had this or that happen, but basic principles still work pretty well.
This bull was probably the fifth or sixth elk I've killed without any camo. I figure that if I can kill a bull when he is intently looking for me after calling him in, I should be able to ambush a deer that has no idea I'm even in the state.
The best advice I have is to spend the money on some really nice arrows or a new bow.