Lean on the "modifications may be made" bit.
When we had one female adult with a troop in one cabin, she'd have a bunk with a tarp hung for privacy ... adults on one wall, boys on the opposite wall. (I actually, slung my hammock outside that night, and that's what I'd likely do if I were the sole male in this situation.)
All the youth will be fine in their yurt. The tenting scenario applies to the more typical situation where you have 2-man or 3-man tents. Basically, abusive situations seem to be more likely when pairs or triples are too far apart in age.
That said, be prepared