Make sure you are aware of your own state's laws about estate planning and end of life decision making, because each state is different.
We had someone from a Senior Agency (or program, or something, can't remember) come do an adult Sunday School class while I was at Peace. There, everyone learned that in Oklahoma, your of-age relatives all have equal say over end of life decision making if you have not appointed someone. So, for example, if you are in your 50s and you have 3 adult children, a spouse, and both of your parents living... they have equal say over end of life decision making if you haven't appointed someone and/or made your wishes known in a way that has legal standing. Imagine your adult children and your parents fighting over what to do! Awful.
I'll also throw out there the importance of hospice agencies. They have social workers who can assist families with many of the issues raised.
And, really, pastors in congregations can call any local funeral home or hospice agency and they'll happily come in and provide education. Granted, it helps them get their name out there, but you can have a series of classes... I did one called "Putting the FUN in funerals!" where we talked about the role of the congregation and how Christians might think through funerals and all of the moving parts there. Anyhow, you have options, and the bonus is that often you can give your adult ed teachers a break for a Sunday or two!