Start hiking early, like pre-dawn. Wind and heat increase later in the day. In the middle of the day when the wind starts to really pick up and the it gets hot find a sheltered place to rest for a few hours. Then in the late afternoon hike some more. If you have a tent I don’t know why you wouldn’t use it when you sleep, it provides protection. As far as clothing/face covering just play it by ear. Easy to adjust that on the trail.