Only what you are prepared to carry! The only access to the Eco-farm is by trail through the Atlantic Rainforest, about 90 minutes' walk climbing from sea level to about 300m. So, travel light and pack only what you need.
Backpack
Hydration bag with at least 2 ltr bladder or 2 one litre water bottles
Light hiking boots or trail/ running shoes for hiking
Clothes to hike in (shorts, t- or long sleeve shirts)
Waterproof sandals or flip flops (easiest to pick up a pair of havaianas in Paraty)
Light jacket or fleece
Pullover/ jumper
Breathable raingear or poncho
Comfortable daypack
Swimsuit
Sleepwear
Flashlight/ Torch
Wide-brimmed hat or baseball cap
Insect repellent and after bite treatment
Sunscreen (F20 and higher)
Sunglasses
Camera
Toiletries checklist:
Toiletry bag
After-sun lotion/moisturiser/aloe gel
Toothbrush
Toothpaste
Deodorant
Brush/ Comb
Razor & shaving cream/ gel (no electricity on the farm)