Quote Originally Posted by Kull
Not a problem (theoretically). The issue is not the number of family members in the battle, but the number who are leading armies. I believe traits are only awarded for leading armies into battle, not participating in the fight.
You sure about that? I know I've had at least two battles with two armies involved, at least one of which contained more than one family member, which crashed my game when returning to the campaign map but didn't if I autoresolved.