I am the advancement chair, and my husband the committee chair for our BSA troop. We have 3 sons, the youngest are both Life Scouts.
I am also somewhat of a tomboy, and like to camp. I am not a scoutmaster because I want to be able to run the advancement stuff.
I think there are benefits of single sex, and I see it all the time on campouts. It isn't actually that the boys are more free to be boys (loud, active etc). It's that they are more free to be kind, affectionate etc. When girls are around, they feel they have to act very manly, and it eliminates the display of the close friendship bond . I went to an all girls high school, and it helped form me into who I am today. In the all girls enviroment, I felt more comfortable in being active, competitive etc, whereas in coed groups I became more girly.
I wonder why the venturing crew couldn't start at the jr. high level? Or have some jr. high crews if that nature of the adventures would be too much for younger teens of both sexes. That would offer the BSA scouting program without the donut hole, and yet preserve the single sex option for those who want it.