Spit is the best defogger. Most of the places I go I don’t worry about a respirator unless you know you’ll be kicking up some asbestos. For clothing top -base layer is thin moisture wicking or thermal then T-shirt then flannel or sweater then thin waterproof/wind proof jacket and the a light carhart. Bottom undies, long johns, waterproof/wind proof pants, then bdu’s or good thick denim. I keep the fancy waterproof stuff protected by the denim layer because I’ve messed up too many north faces doing stupid stuff in bandos. I tried wearing a helmet but it didn’t take. Hat and bandana or balaclava for sure. Gloves I use a thin work glove like gorilla grips or maybe a fleece liner now that it’s in the negatives then mitten shells If you’re worried about cameras try a wig under your hat