The trip was great! I think I made the Argentina and Brazil travel agents job easier by already knowing exactly which lodges we wanted to stay at. He did a good good of putting together the inter country flights and having our guides waiting at the airport and hotels for us when we arrived.
The entire trip was wonderful! Hard to say the most memorable...however, The Fazenda Barranco Alto in the Pantanal was probably my favorite. The owners and staff were above and beyond fun and accommodating. We will definitely go back. We also got to see so many beautiful animals.
I would make all the reservations on my own.