I'm a lawyer, working in bitcoin full time since early 2014. I've been working on this inheritance issue for a few years now. You can find free resources at my website: empoweredlaw.com, including a "Letter to Loved Ones" template that you can use to let your people know you have bitcoin after you're gone. If you need more, I've also written a book: Cryptoasset Inheritance Planning, which will guide you through the steps of making a plan that will (hopefully) work for you and your loved ones.
There is no one solution, every family is different. Some people have families who are technophobes, others are cryptosavvy. Some have younger or older people they are responsible for, others don't. Your risk profile and your family situation will determine what the "right" plan is for you. However the most important thing you can do to help them is designate 2-3 people who can help them recover your assets when you're gone. It's likely you're the bitcoin expert in your house. When you're gone they'll need someone else, trustworthy, to help them. I don't like the idea of just one person (single point of failure) so I prefer to designate a couple of people who don't know each other or have no reason to collude.
Hope this helps.