In the game random or from something dependent on the outcome of the decision risk? (Frostpunk)

Actually, the question on the decisions in quests with the scouts. For example, the location Creepy cave - you can take a chance to attack the bears and win. And it may happen that the scouts will be eaten by the bears, but the survivors from the cave would be saved and come to the city.
In the scenario, if I am not mistaken, Refugees there is a trailer on the edge of a cliff. You can pull out of his petty loot and leave. And you can take a chance and reach inside for more valuable supplies. Three times I played the scenario two times my scouts climbed into the trailer and carried everything. The third time they, along with the trailer fell into the abyss.
Surely there are other similar places. Actually, the question is: is it random or from something dependent on the outcome of the decision risk? No one is aware of?