>>Crazy-prepared meets Properly Paranoid, for a mundane purpose. ("Why are you planning our shopping trip like it's the Norman Invasion?" -> "Oh, that's why.")<<

Almost every time I've had to do this, it has been to compensate for non-standard needs (language, disability, dietary restrictions...), or chaperoning kids.

The few other times are mostly my being an anxious person.

Aaaand, you eventually get a reputation for being the Prepared One. (I started joking with coworkers that I Do Not have alien repellant in my purse, so if aliens invaded they'd have to figure ot out themselves.)