1: Regarding Rav Falks sefer. My wife doesnt use it, so I dont have it in the house. She prefers the sefer Halichos Bas Yisroel.
2: The Minhagim surrounding when a Kallah covers her hair are many, including those whose minhag it is for a kallah to cover her hair prior to the chuppah. Perhaps this is A reason but not THE reason.