The problem with the team is that they have done everything out of the "Book". They were lucky and got an elk. If the experiment went on for a couple of years they would soon establish a proper division of labor. The best hunters would get the most sex.
If the group went and lived with some hunter gatherers for a couple of weeks before the experiment they would have been much better prepared for the challenge. The story does however, illustrate well, why more successful tribes have moved on from the stone age. If however there is a dramatic change in the weather and other stuff that is happening on our globe, the genes are there for some to survive in difficult circumstances. Many however will die off. The Pygmies in the Democratic Rep. of the Congo in Africa. The Bushmen of the Kalahari Desert and at least one other group of hunting gatherers live in Tanzania.
The Congolese pygmies from personal visits to them, are all skinny, have no pots, water jugs, etc. They carry their kids on their backs and loads with a "tumpline in a basket" because in the jungle it isn't practical to carry stuff on their heads like most other Africans do. The Pygmies until recently were were almost naked - there is no real need for cloths in a tropical jungle where all kinds of fungus are waiting for some place to grow. They never developed a spear thrower.
The Pygmies use poisonous arrows, knives, digging sticks and machetes to catch their prey. Like in the series, they mainly survive small animals that include rodents and bugs. If they do get large game there is a large celebration. Unlike in the series Pygmies eat, almost all of the animal and don't dump out the guts of the animal. The intestines are more or less cleaned and cooked along with the lungs, heart, liver and kidneys. Preservation of the meat is done by smoking it. I doubt if meat will last long by being put in the river. It is likely to rot or other predators will get a feed on it. Inuit in Canada, where there is permafrost dug holes and buried fish and meat where it froze for storage. I feel it would have been more real if the actors had to make their own cloths from skins they prepared before going into the field. This was a real art for the stone age people who really had little to work with. I enjoyed the show and it showed how much more the actors really had to learn. During the Vietnam war many Americans came to Canada to escape being drafted into the forces, where they planned idyllic lives living "off the land". Very few lasted one year in the bush, before they moved to the village or city. It is difficult to go back in time.