Hey Chalkdust,

I'm no expert, but I don't think fugues are ever planned.

Here is some info you may find helpful.

Petunia

Psychogenic Fugue is the assumption of a new identity and the inability to recall one's previous identity; it involves a complete switch in lifestyle, including home and/or work recall. This is usually caused by
severe psychosocial stress, such as severe marital problems, being a part of military conflict, or being in some type of natural disaster.

Psychogenic Amnesia is a sudden inability to recall important personal information, when not due to any organic cause. Like Psychogenic Fugue,this is usually caused by severe psychosocial stress

Both psychogenic fugue and psychogenic amnesia are sudden , and they both
are usually fairly short-lived, with a complete recovery made. They are most common during wartime or just after a natural disaster.