To me one solution is that it seems possible to have an "out-clause": circumstances under which you'd prefer to have your preservation/suspension terminated.

This runs into a thorny ethical problem. It's like assisted suicide, except you're neither terminally ill, nor in a vegetative state, nor in extreme pain. Since you don't have anything more than a vague idea of the future, you're unable to provide the kind of informed consent necessary for this sort of thing. A friendly future is more likely to revive you and provide you with the appropriate psychiatric resources.