All opinions count - North American Anthropology - facts and fiction?

There have been some questions lately about anthropology in North America where I have contributed some facts, and also had a little fun for myself. I get the feeling it wasn’t fun for everybody.
I decided I would ask this question to make a gathering place for very amazing/interesting/obscure/new facts but I also want to see some fun imagination.
What if camels had flourished and survived in their place of origin, and populated well through the area now our U.S.?
What if the first human migrations began following rivers inland rather than the coast southward? It could have left South America generally unexplored until arrival of the Spanish maybe?
What if the human migration to the Americas had been familiar with certain mammals much earlier?
I still would like someone to make and post a rendition in any medium, or several, depicting tribal life had they salvaged and domesticated the remaining camel and horse populations preventing their extinction. Might they have gained a travel advantage, and enslaved Europeans who landed on their shores?
Have fun, and play. I welcome all input.