I agree with lemongrove. They don't want to take the children. They have made their excuses and they have to be accepted. It is not about obstacles that you can help them to overcome. None of them are insurmountable if there was the will. They don't enjoy family gatherings but are going anyway themselves which is probably as much as you can expect.
Given that this is where they are, any offers of help will just sound like nagging. I don't see that you have any option than to accept that this is the way they want to live their lives and respect it.
Someone I know shouldn't be driving. In my opinion.



