Continuity mistake: After Kath pulled up to the cabin, the position of her car changed. Kath drove parallel to the fence before turning to the right about 45° toward the front door, but when she got out of her car, its rear end was perpendicular to the fence. The angle of the shot of Al coming out the front door would also place Kath's car more pendicular to the cabin instead of at an angle, and parallel to the fence instead of at an angle. (00:05:39 - 00:06:36)
Revealing mistake: Max rolled down the front passenger side window and no wind came into the car, but when he had his face barely out the window, his hat blew off (not shown on screen). If wind hit the visor part of his "bugout" hat, the hat would have most likely blown off into the car. (00:03:40)
Other mistake: The GPS voice said, "Your destination is on your left", but Kath kept driving (slowly) on the dirt road and did not reach the cabin for over 30 seconds (longer than would be expected). A GPS system typically announces how many feet until you reach your destination, plus "You have reached your destination" after traveling that number of feet. (00:05:00 - 00:05:38)