Callie's got to be even more freaked out when she figures out Dad's in on it too.
Nat specifically said that Travis never believed that stuff, so he probably wasn't a follower and I'm not so sure Tai is either. At least, not consciously. Remember the earliest blackout of hers that we saw she stole Van's bone, so she might be repressing so hard stuff comes out even more.
I honestly doubt she even made that much of a decision. The show made a point of reminding us, in the end, that Jackie was the person least adapted to living in the wild. She probably only stayed outside to make a