Trusts can work also, but there are some subtle issues. For example, just because you have a trust, with another person also a trustee, does not automatically give that person access to property that is not specifically "titled" in the name of the trust.

For example, if you have a trust etc, but have a bank account in your name only, the trust/trustee would not have the authority to withdraw or obtain funds from that account, but the person holding the "power of attorney" would.

Making sure what property is titled how and who can access it can trip people up at worst time. Even if you set up a trust, a power of attorney is usually recommended/required to cover the situation of something not being titled in the trust's name.