Ctenidae, probably Phoneutria fera
While i was thinking of turning back to the camp, this spider appeared over us as the perfect sign to execute this decision.
"The Brazilian wandering spiders (Phoneutria spp.), armed spiders ("aranhas armadeiras", as they are known in Portuguese), or banana spiders (not to be confused with the relatively harmless species of the genus Nephila) are a genus of aggressive and highly venomous spiders found in tropical South and Central America. These spiders are members of the Ctenidae family of wandering spiders.
The Brazilian wandering spiders appear in Guinness World Records 2010 as the world's most venomous spider."