I didn't quite understand if you're going to kill the second patrol or just pass by – Medzh suggested that, but no one responded. Also, I don't know who among you will "pretend" to be the second patrol if it comes to that – the characters have different stats, and therefore the checks will also pass differently.
I think we should leave the cosplay to Ples and Kosha, because they are unarmed, and Ples also speaks in a "Burkhan" style. On the other hand, there probably aren't any women in the "Burkhan" army, plus Kosha has very high strength. So maybe it would be better if, say, Heroist gives Kosha a knife, and he disguises himself.