>>480682> bivy> sleeping bag> tentFor a Bug-Out-Bag, I'd say that a tent and sleeping bag are excessive weight and bulk and in the event you have to quickly bug-out from your bug-out location, you'll liable to have to leave them behind.
IMO it would be preferable to pack a pair of thick fleece pants and a jacket to wear under your GoreTex rain suit, which packs down much smaller, will provided the needed insulation as well as wind and rain protection, is quick drying and you can wear it while on the move in cold weather.