Legal Question in Wills and Trusts in Washington

The simple answer is yes. I handled this very issue several years ago and the state backed off. Remember, it is YOUR money and YOU determine where it goes. All trusts in WA are automatically spendthrift trusts, meaning the beneficiary's creditors cannot access the trust. TIP: Establish an inter vivos (while you're living) trust, NOT a testamentary (in your will) trust. If it is a testamentary trust, the will that establishes the trust must be probated and the state gets notice of the funds. (This is what happened in the case I had.) HOWEVER, if it is an inter vivos trust (often in these situations called a revocable living trust), the state never knows about it. Change the insurance beneficiary to the John Smith Trust, or whatever you call it. If you have a house, title it in the name of the trust and he can live there according to the trust terms. Go see a lawyer to have it done right.

Additional point: I realize from your question that you might have been contemplating the trust as a short-term pass-through. But as soon as the beneficiary has money in his possession (wallet,bank, etc.) the state can take it. Thus, the terms of the trust must be such that the money only comes to him as needed and that the trust--rather than he--makes most expenditures and owns and maintains the items, such as a car. In that way no money comes into his possession. If he has a bank account, his information will be necessary and the state can then track him.