No, they're not crop circles - first, you stomp out the space where you'll but blocks so that the snow gets compacted a bit and is stronger.
Wolfgang (in the yellow) giving Tony some pointers on how to build the shelter. You can see that they're starting to take shape.
Everyone had a little kitchen area for cooking and eating. Notice how much the stove has sunk down into the snow. It's essential to have your stove on a platform of some sort so that all legs sink at the same time and you don't end up with an overturned pot.
Variations on a theme - Wolfgang just made a simple trench with A-frame because he wasn't sharing with anyone on Saturday night.
Phil and I making breakfast on Sunday. Note the french press and wine glass - we were really roughing it.