Never been to Argentina, but in good spots in Peru we can shoot 100+ in a morning, and you can run a flat easily if it's a really good place. And this is not a "target rich" environment as it is in Argentina. Many of my friends from Peru have gone to Argentina and Bolivia (politics are tricky now and Argentina has a better industry setup in general) and were still impressed. Pf course it was among friends and almost a "friendly but competitive trip". As has been said money is made in shells.
Find out how much ammo if any you can bring on your own, as that may be something worth doing. Stick to O/U so at least you have to reload
When I have had a lot of shooting opportunities I try to practice specific shot presentations (crossers, incomers, doubles, etc) and only take those shots for say 5-10 birds.
