We stopped off at a new spot just opening in Foz, and it's good. We stayed in our truck, but there was a also a biker from here (Mika) staying at the same time. It's secure, decent sized yard with good gates, clean and near to all the stuff you need (Supermarket, Laundry, pizza,
.....) The owners are bikers, and know their stuff when it comes to helping out on just about anything bike or paperwork related to the borders.
We did a blog post
on Foz it was so good!.
You can get them at iguassutravellershostel at gmail.com, or you can contact "Iguassu falls Quati" on the hubb.