The Skin Tone:
I honestly think the simplest possible credible explanation for the orange skin can be attributed to the false memory of a 12 (???) year old boy at the funeral.
I believe that most of the families attributed this event to a military accident and so rumours were probably rampant at the time that they had been hit with some kind of bomb/rocket. I'm sure they thought the chemicals therefrom changed the colour of the skin. https://media.mnn.com/assets/images/2016/08/tattoo-otzi.jpg.838x0_q80.jpg
This corpse was of course mummified, however, it was frozen and I think maybe that can account for the strange skin tone reportedly seen on the corpses at the funeral. This could be especially true of Dubinina's chin as she had been frozen longer.
We just don't know how dying in subzero temperatures affects the skin. I know corpses found in water are usually a green/black colour, so who knows if this is the colour that results from being frozen and then thawed??A Fall
I suppose we don't know if the den had a "roof" which would have then collapsed as your "tracked vehicle" (Nigel) rode over the Rav 3. Sometimes I think comments made by Vozrozhdenny such as "could be the result of an impact of an automobile moving at high speed", are misleading. It makes you think that only a vehicle could have been responsible. But this is not the case, he is talking about the FORCE of impact being comparable to being hit by a vehicle.
When it comes to a fall:
"Vozrozhdenny, who undertook the autopsy, excluded accidental fall on the rock as a possible cause for such a massive and unusual fracture.
From what kind of force could Thibeaux-Brignolle have received such injury?
In the conclusion, it’s shown the damage to Thibeaux-Brignolle’s head could have been the result of the throwing, fall
or jettisoning of the body. I don’t believe these injuries could have been the result of Thibeaux-Brignolle simply falling from the level of his own height
This is important - because I'm saying he didn't fall from "his own height".
There is evidence ( I think WAB mentioned it) that Kolevatov went between the Cedar and the Ravine (den). Maybe the Rav 4 were going back and forth - walking on top of snow and ice with a water running below. This could create a pocket through which they could have fallen through onto the rocks, no?