DH and I are also think of getting a will, durable power of attorney and healthcare power of attorney drawn up for each of us. I decided against the living will, because in my state, it seems to give the doctors the right to pull the plug, including nutrition and hydration, without consulting family members, and without regard to the fact that I might be pregnant with a chance for the baby to survive. Even though the living will is packaged with the healthcare power of attorney, they are seperate legal documents.
I don’t know about your state, but Ohio has a standard template for the living will and healthcare power of attorney so you can do them on your own, just fill in your personal information and the information for your contacts then have it witnessed or notarized.
I would definately recommend having an attorney draft your will and durable power of attorney though. Too many factors to consider with little ones involved, and the DIY ones on the internet may be “airtight” and completely legal, but a good attorney can include clauses that help make things easier for those you leave behind.