I just called my buddy who has spent time in Argentina and he said to tell you that you will have a good time there. I asked specifically about knives and he said you should be OK with taking reasonable folding knives in your checked luggage, and then get it out as soon as it's feasible after you land there. He took two Victorinox models with him. He said most of the men he was around had a fixed blade in a sheath stuck in the back of their pants usually. Some were kind of fancy, very pointed "hunting" knives, but he said those men who were serious cattle raisers and cow hands used somewhat heavier knives like those we call butcher knives. That's why they carried them, too, to butcher cattle. That was a common chore on the pampas (grasslands) where my buddy was visiting. Raising cattle is a big industry there and he said to tell you that you will eat a lot of excellent beef cooked in many different ways, but especially good steaks. He also said a lot of good leather products are made and sold there, too, such as belts, jackets, and vests. You might want to bring something like that back with you. Have fun!