Glenn, I agree with you on the logistics, but I don’t think the wildlife angle applies here.
They weren’t storing raw meat — just tins, salt, sugar, oats. Wolves don’t dig for that, and a wolverine can climb any raised labaz anyway. The Mansi used tree‑labazes for big lumps of meat, not for the kind of food the hikers were carrying.
So Igor’s diary line reads to me as purely practical: no trees, no structure, no point carrying extra weight.
A raised labaz wasn’t possible, and a ground cache wasn’t a predator concern.
His conclusion was simply: “We can’t build anything here, so we move.”
That fits the tone of the diary and the later snow‑pit cache.
It looks more like a weight‑management decision than an animal‑protection one — there was no point hauling supplies they weren’t going to use on the 1–3 days before returning along the same path.