To observe a tent on a mountainside and think someone put it there and it wasn't the people that were found dead close by and who owned it, because they wouldn't be able to carry it ,(yet there are pictures) raises questions?.
How did the people that covered up the deaths get the tent to that location along with all the bodies and equipment if it's impossible to carry the tent?
military helicopter. remember the lights seen at night? they had radar and were more than capable of night flights
The outsiders would have to transport all of the group's equipment ( skis, boots ,food, pants,tent,poles, pans, cameras, axe's, bodies etc) up the slope and all of their own equipment. They would need their own tent and supplies to stay in whilst they planned the event of , fake foot prints, photos, how they would plan the scene so it looked natural( but it doesn't look natural to you) . They would have to know what to write in diaries, know what was in the cameras that have half used film that hadn't been developed in them.
This was 1959 after WW2, not the 1800's , they not only had helicopters to fly people in and drop them off so when they skiied down, there were tracks. Don't forget this was the main time that spy masters from every country played with lives all over the world. This would be nothing for them to do. What messed them up was they used local honest people for some of the reports and they did everything they could to mess it up so the parents would know. Just because the government was known for corruption doesn't mean the population was
These stagers would then have to start a fire by the ceder for some reason, break branches up a tree, make sure they didn't leave anything behind at the source of accident and at the tent, ceder,ravine and the slope etc.
like I posted, this would hardly be a problem for experienced cold war workers.
How did they get the dead bodies to their final resting places?
helicopter
Is this how your 1+1= 3 is working?
It's working out well, not only did I answer your question in a timely manner because I was paying attention, I also learned that there are people in this world who think that any country that isn't bombing maternity wards is an inferior country. but as my mom always said, consider the source.