I dont knove but that Trynnie in the Umpani camp left my party when i killed the Umpany guys! So i suggest you must use an save before you entred the "Away Camp" and you dont HAVE to talk to those guys anyway but i did and they allredy hate me so that was not any problems for me!
I also trie to kill ALL the Rapax Templars there but there i got my butt killed ha ha! So dont trie that!