The weather is overcast and snowy, but when Mac and his friends exit the cave, it is obviously bright and sunny outside.
When Grant starts to climb off his snowmobile some of the crew and two stage lights can be seen reflected in the windshield.
When Mac and Dalton pull up on the dogsled to the circle of the totems they get off and look around for the totems. When they spot the one that Jamie Two Eagles cleaned the snow from they comment that he must be leaving them a trail to follow. Why don't they just keep following the snowmobile tracks through the forest instead? That will lead them straight to the bad guys.