@Swissgemma - the Muslim girl will not get as far as discussing sleeping accomodations because her religion prevent her from joining a mixed sex organisation!
Strict Muslim parents will look at the Girl Guides policy on trans girls and trans women in Guiding, and will conclude that their daughter might end up in a company with either a leader or another member who is trans, and who may well have a functioning penis - and they will forbid their daughter from joining.
And if Jo, the trans girl, wants to share a tent with Sarah, but Sarah doesn't want to share with Jo, Sarah may well feel unable to say so, for fear of being labelled a transphobic bigot. Jo's wishes could well override Sarah's - but because Sarah is a natal girl, it is just fiiiiine to throw her under the bus.