The Rogers Pass was far away from Los Angeles. Even if they took an airplane, they couldn't reach there directly. The base had arranged them a helicopter, but it could only fly to the center of Montana. Then they would have to take SUVs with good snow tires to get there. Otherwise, the car might fall off the cliff due to slippery roads while passing through the snowy mountains.
The people who came with Feng Ling were all her acquaintances, including Fattie and some other members of the base. They knew each other, so they cooperated well.
When Fattie heard that he was assigned to the task of Rogers Pass, he was extremely resistant to the decision, but Han Jin just said that this mission would help him lose weight. It was a reason he could not refuse.
When they finally reached the terminal, which was just above the Rogers Pass, it was already the middle of the night.