Our weather will be below zero in the next few days, and warming up to 15 deg by the time I am in the field. The only tools I will have are a folding knife, and a contractor trash bag. I will carry a gortex bivy and bag as a back up.

We will have one good fire going all night long away from the shelter.

The ground is frozen solid. I will have access to snow, leaves, grass, and some bark. Very few conifers. I carry a messenger bag with me at all times and I want to test living with it alone for 2 days.

I am thinking build up a large bed to get me off the ground and fill the contractor bag with insulation.

Depending on the material I may try a fire in/near the shelter.

Anyhow thanks for the tips I will post an AAR after.