I don't. And that's where things get tricky. I haven't quite figured it out yet but I plan to use my Siltarp Poncho set up as an A-Frame or partial A-Frame using trekking poles (and maybe the fictional sled) as part of the structure. I need to figure out a way to anchor it all...your drill bit idea is interesting.

I'll have a space blanket ground sheet to reflect heat back and an air mattress to keep me up off the ice and eliminate heat loss by conduction.

Other than that I'll just have my sleeping bag and the AMK 2.0 Bivy...and a spare space blanket.