Hey Tyler, I'm from MN and know a little bit about the Sao Paulo scene. Not sure your mode of transportation while you're down there, but I can help direct you to a few resources to help you get on the water. Check out Wake Brasil,
http://www.wakebrasil.com/dicas/onde-praticar/, there a quite a few places listed to ride in Sao Paulo there. I've met Eduardo Jovem before and he would def try to help out anyone wakeboarding. Great guy. You could also try to get to Naga cable park, which is awesome, located outside the city of Campinas. Kind of a hike from Sampa (What they call Sao Paulo). I also speak Portuguese, so if you want to meet up prior to heading down, let me know.
You weren't out last weekend? =)