For non-vehicle bug out- AMK Bivy bags for the two of us and the 2 person heatsheet. Ridge rest closed cell pads. Tarp and Cord for either shelter or ground. I also have 2 foreign military emergency blankets, thick silver, polyester, I think, I got them years ago from SG but have never seen them since. Kinda overkill but everything light weight enough to accommodate.
For backpacking- Thermo-lite Bivy bags and fleece sleeping bags. Ridge rest pads and Rei Camp Dome Tent w/footprint.