Extensive casting auditions were held to find the more than 30 actors needed to speak with a British accent.
While filming in the barn, several hornets' nests were disturbed and many people were stung.
Many of the 537 extras were friends and family of the crew as well as descendants of actual handcart pioneers.
The wolves were kept away from two-year-old Keaton Stinger. He performed his scared reactions with a dog that was brought near him.
No animals were hurt during filming - but Bruce Newbold was. He hit his head entering the miracle cave without a flashlight.