Here is a drawing of the type of snow cave we built for our troops Klondike Camp. First, you dig a ditch into the snow and then you lay a tarp over it. We left a small opening to enter the cave. At this camp, we went fishing but no one actually caught anything. We think it may have been too cold. We kept warm by eating chili and drinking lots of cocoa.
I actually got really hot in my sleeping bag and it was much warmer than I expected.
I am looking forward to next year's Klondike!