It doesn't seem like it would be too bad. If they are in the same spot for two weeks or so then I think it might be worth it. For a week or less then a tradit

It doesn't seem like it would be too bad. If they are in the same spot for two weeks or so then I think it might be worth it. For a week or less then a traditional cooler with dry ice seems like it would be clearly better. The type of soil (rocky or not) would make a big difference. Though icy ground where this would work best would be the hardest to dig...