The protocol Polar Latitudes is following was developed specifically for travelers transiting through Argentina on the way to, and the way back from Antarctica. Last week the Argentine government announced that beginning November 1st they will reopen the country to independent travelers. As of this writing details on the Nov 1st protocol for independent travelers have not been published on the government website, and we have no information as to the allowance of independent travel.
We recommend that you contact one of the Argentine embassies or consulates, before planning pre/post voyage independent travel.
List of Embassies & Consulates by Country (clicking-in gives a list of locations with contact info). https://www.cancilleria.gob.ar/es/representaciones.