The best solution will depend on your needs and the specifics of the situation, but one alternative to a dead man switch is to have instructions or credentials

The best solution will depend on your needs and the specifics of the situation, but one alternative to a dead man switch is to have instructions or credentials that require multiple trusted people to access. If you are paranoid you can choose people who don't even know each other, or give yourself the option to cancel the release of the information with a dead man switch with a shorter duration. It'd be a shame if such a complicated system that isn't tested much were to fail, though...