We are going in July and I am also wondering how the exchange process will work. It was suggested to me that when, say, eating in a restaurant and after receiving the check, casually ask what the price will be if we pay in US Dollars (cash/efectivo)? It was also suggested to change dollars at the airport, although this is something I almost never do. When we were last in Argentina (Feb 2020) ATMs would limit withdrawals to something like $50 US-equivalent and with a $10 fee - not ideal.

Back on-topic: I've stayed at this property twice and was upgraded to the Presidential Suite both times. Hoping for a third...