You can combine Argentina with a nice trip to Montevideo and/or spending some days at the beach !!...Uruguay has lovely wide beaches all with good acces by car/bus or even plane.Getting here from abroad choose Montevideo Airport(MVD) or Punta del Este(PDP).From Buenos Aires(Argentina) you can take the ferry look under Buquebus/Seacat or Coloniaexpress...with the ferry you can also include the bus to Montevideo or Punta del Este.In Uruguay there are quite some car rental companies...either on or near the airports or in the cities as well.