I agree with Millie210. Kids are smart. We have planted little seeds in our children and they seem to get it. You don't have to bombard your children with facts, just plant things over time.
I would also make sure the Elders know that regardless if you are attending meetings or not, you are still the head of your house and they need to tread lightly. Be tactful but firm. They need to respect you no matter the circumstances. Some of these Elders try to use intimidation, push back and you may be surprised how some (not all) head for the hills. I have tried this with some of the Nazi Elders, it works.