I did this back in the 1.3.x and got the speech checks but failed the 3rd one and just slaughtered the two camps.
Sorry for bumping an old topic but rather than starting a new one, I wanted to see if anyone was able to do this? I have tried looting the chest in the cuman camp (northeastern corner). I’ve tried multiple times using a save point before the camp having had no interaction with them before hand except for the Timmy quest when I sent the bandits on a wild goose chase. I put on the entire outfit, removed all jewelry and anything not Cuman and it still didn’t work. I’m immediately attacked the moment that anyone sees me. There’s no dialogue options. This is my third play through (hardcore, patch 1.9.2, PS4) and the disguise still doesn’t work. I have seen videos of people actually getting this to work and I would really like to experience it for myself but it just won’t let me.