Don't worry so much about the walking caravan. They tried to cross from Chiapas state into Oaxaca state and have been stopped by Mexican authorities, still in far southern Mexico, and required to register. That will at least slow them down for a while.

http://www.tabascohoy.com/nota/458483/prepara-pf-bloqueo-para-frenar-caravana-migrante-en-oaxaca

http://www.tabascohoy.com/nota/458502/llegan-migrantes-a-territorio-oaxaqueno

Some of them gave up in Huixtla and were returned to Honduras, and a few accepted papers to stay in Mexico while asylum claims there are processed. According to one of the comments, Mexican citizens sometimes have to wait a long time to get these same papers in their own country.

http://www.tabascohoy.com/nota/458506/entrega-segob-curp-temporales-a-migrantes

But unknown numbers of women and children, including pregnant women looking to deliver their babies in the United States, are being shipped express to the US border. (Both human trafficking and an attempted violation of our national sovereignty.) Here is one truckload that was stopped about 100 or 150 miles short of the US border.

http://www.tabascohoy.com/nota/458485/rescatan-a-100-migrantes-de-viajaban-en-caja-de-trailer