I'm doing Buenos aires, patagonia (el calafate), igazu falls, and maybe mendoza if i can fit it into the budget/schedule and not have things be too packed. Might take a day trip into Montevideo (uruguay) as well. Haven't picked hotels yet. I have a short list of boutique hotels in BA and el calafate (debating eolo vs estancia cristina). Curious if anyone has specific recs.