I'm not a lawyer, nor do I know anything in your state/country..... But I will say that in my family that had trusts, filed by lawyers--even those weren't followed. They basically weren't worth the paper they had print put on. I mean one said "divide the money" and the person didn't. over 10 years later, and multiple court dates, and we've still not received a cent.
So will or not, if you meant to do something might really depend on where you are--because from my personal experience in the USA, things don't matter at all, people will do whatever they want whether you say "split everything" or "jump in a lake"