R.K.
The shin and arm pads I tossed into the washer with my uniform. The chest pad and headgear I just wiped out with a damp cloth.
I would not put anything in the bag to help with the smell. Dryer sheets give me a headache, it's bad enough being in a room with people who have washed and dryed their clothes with highly scented products but to add a dryer sheet in the bag would consentrate the smell and not only give me a headache but nauseous as well.
Anything powder could spill on the floor and upset the owners/instructors. I would use powder in my shoes and take them off at the door, to walk stocking feet to the changing room, leaving powder tracks on the carpet -- big NO -- NO.
As long as you keep the uniforms & equipment clean you shouldn't have an odor problm.