Absence of evidence is not evidence of absence?
I'll tell you what:
You go leave fecal matter, cooked food, discarded clothes, and bones on someone's property and see how long it remains there.
The Israelites, when they first entered the wilderness, were attacked by elite desert warriors called Amalekites.
These people lived in the desert like we live in the city, and were it not for God's intervention, those Israelites would have been annihilated.
Now as to your 'discarded clothes' you brought up ... I like posting this verse.
Deuteronomy 29:5 And I have led you forty years in the wilderness: your clothes are not waxen old upon you, and thy shoe is not waxen old upon thy foot.
Scientists, who today deny every jot & tittle of the Bible, went looking for clothes left behind; probably because they didn't believe that passage -- and they forever remind me of those who went looking for Elijah for three days and couldn't find him.
At least they were "sapiens" enough to acquiesce and believe what Elisha told them.
Unlike today's scientists, who practice a form of Bible-denying witchcraft.