I’ve been wearing “bike shorts” under my hunting clothes for many years now. These shorts are the kind you might wear to pad those “comfort” zones from the ungodly awful seats they are putting on bicycles these days. They have padding built up in the crotch and seat area, which also adds just a little bit of insulation to those areas for cold days. Instead of carrying (another thing to forget) a pad to sit on, you have a built in one. Yeah I know, they feel like you’re wearing a diaper, but they keep your tush warm and comfy.