I've done wills for years and years and our standard practice is to always very strongly urge against having a letter of wishes. Anything that you want done in terms of your estate and care for your children should be included in your actual will.

I would also strongly urge you to put in place an Enduring Power of Attorney now. While the will deals with what happens after you day, the EPA deals with things while you are still alive but not capable of making decisions for yourself. Sorry to be morbid, but say you have a car accident and are in a coma. Maybe permanently and irreversibly. Your husband can't deal with your home because it is in joint names (I'm guessing - that's what's normal). So, your main family asset could be tied up and he won't have access to any funds - say he needs to move to a smaller house and pay for assistance for looking after your boys or whatever. Same goes in reverse. Millions of awful scenarios but that's just an example.

Anyway, an EPA would give someone power to deal with anything and everything on your behalf. Most common would be for you to appoint your DH and vice versa. It is also sensible to have an alternative. Really awful situation - both you AND your DH have a dreadful accident. Appoint someone you trust implicitly to step in on your behalf. FWIW, my DH and I have EPAs. We appoint each other and I have appointed my mother as an alternative.

Hope that makes sense.

I would really strongly recommend going to an estate planning lawyer to get your wills done, especially given that you want something fairly unusual. The Public Trustee is fine, but there are all sorts of ways a will can be done to minimise tax as much as possible, protect assets against bankruptcy, pensions etc. The Public Trustee provides very much a "no frills" option. It is something that most people hate doing but it is an incredibly important matter that should be handled properly by professionals.