We left Arizona with a cracked windshield on the towed Jeep. We decided not to have it repaired thinking we'd just get another on our Alaska trip. We returned to Arizona with the same crack and no additional damage.
As other stated, leave space between you and the person in front of you on gravel/construction areas. When you see an oncoming truck moving fast pull over to the side as far as safe and slow way down. Many times we just moved over and stopped. Some of those roads have very little traffic and you can do so. This is especially true in the Destruction Bay area, rightly named. :) It will always have miles of gravel because of the permafrost.