FYI...i knew travel was going to be a hassle with multiple closures and most transit shut down, but if you live in certain areas be prepared to show proof of residence to enter (eg puerto madero).
http://www.buenosaires.gob.ar/jefed...-del-g20-cortes-de-calle-transito-y-servicios
http://www.buenosaires.gob.ar/jefed...-del-g20-cortes-de-calle-transito-y-servicios