What happened to Laredo's Winter Texans?

Hundreds of RVs like this one visited yearly

I clearly remember, years back, the Laredo Civic Center's west parking lot being completely filled with Winter Texans' RVs. They would station themselves neatly in formation and, as far as I can tell, stay for weeks. The Public Access Channel offices were not at their present location yet and the RVs took up all the area from the entrance to Shirley Field in the South, to Garden street in the North and to Convent street in the West. This happened every year during the Winter and I really don't recall when it was that they stopped coming to town for the Winter. Now, it seems like they all head to the Magic Valley, RVs, money and all.