The Hebrew Bible (aka Old Testament) mentions camels as pack animals as early as the story of Abraham. Though there is no archaeological evidence of Abraham's life, we hear from some of the religious and scientific communities, including Chabad and the Associates For Biblical Research, cite the 20th century BCE as his time of birth.
Who to believe? There are some who revere the authors in absentia and still take the stories literally in part because the view of the world they tell of fallen heros, chosen groups, god-fearing behavior and non-interest in worldly things is compelling.
"Too bad", as someone once said of Freudian theory," it's a wonderful story, but it isn't true".