Hmm... my friend. She's incredibly ridiculous. And a little evil. I think we'd be pretty darn happy there, though.
My stuffed animals.
Or Ariana Grande and Iggy Azalea
All of My favorite series of books and wait for some one
A leaf! :D I could put a little ant on it, to send help! GO, ANT GO!
The thing is, if I get stranded on a desert island, it would be by accident, so I have little control of what I'd be bringing. If I'd travel to one for some reason, I'd make sure to have a guaranteed way to get back.
But if I really have to bring something "ridiculous," it would be a guide book on how to build all sorts of transportation from readily available materials. :) OR just the form of transportation I used to get there in the first place, provided it's not broken. :P
Would a pillow be considered ridiculous? :D