Heh. Just a short hop for the "birds" from South Texas where they many tend to overwinter now. What's another few hundred miles??? But what will the bone diggers think of the all the RV's and stuff they uncover? Will they decice that these were nomadic hunter-gathers??? So many questions; so few answers. ;^)
Of course they will be called nomadic hunter/gatherers. After all, they will have religious tokens(U.S. coins) and artifacts such as movable homes called “Vans”, “RV” and “Suvs” , etc.) dragged by hand from the territory much further to the north where similar items are much more numerous.
Another branch of archeology will chime in that the artifacts prove that there was widespread trade between the inhabitants of areas known as Pan-Mexico and Can-America.