Hahaha, way too much! Just about the limit of what a person can carry. I really should have taken a picture, because I'm kinda proud... not so much of my lifting ability, but of stashing things in an incredibly compact way. In the end I was carrying a big trekking backpack, a small day-pack (these two I usually fly with, so up to this point is the "normal" travelling luggage. Additionally I had a humongous sea-sack, filled with my big tent (which alone weighs 23 kg) and the rolled-up spirulina cultivator. So my guess is 50 kg at least, in total.