Great idea on the life story. If your write as good as you post on Pelican you'll be good to go. (You do have a way of telling a story.

)
A small gift of candy is also a good idea.
I would pass on a big party, however. Maybe a small gathering of close friends for drinks and appetisers. She must have a favorite restaurant.
I think whatver you do, as long as you do something, will be ok with her.
Maybe all of your Pelican friends could send her a card?