Since the core presentation of the activity logs is now unit based vs. individual, have a link under the main unit page. Before when it was more of a personal log, it made sense to have only under individuals. Now, it would make sense to have it under the unit.
If I had my druthers, it would auto select the particular Scout you were viewing if you clicked activity log instead of presenting you with the whole unit.
If you were going to have my new link under the unit, auto select all Scouts, the deselect the ones not participating.