Two of my best friends (none of them on DA). Talked to them about a similar issue when I had crippling mental problems. But my DA account doesn't need much caretaking, it just rested for a year during my crisis.
Depends on what you ask the person to take care of. I wouldn't send them to the forums. Just return llamas. Hey, perhaps I could get a bot to do it instead. Might be more convenient. Automatic return llamas, thank you replies and I can schedule new uploads (as if I'm ever uploading stuff) already, because I've got Core.
Well, if I had to be away for awhile I'd probably just post a status update or something. But if I had to entrust my account to someone, it'd probably be my friend who used to have an account on here, so they know how it works.