This is sad. The whole thought; the whole idea that I can't read things back; to post apparently meaningless "stories" into the void.
We have/had blogs for this, with the exceptions that those are not ephemeral. To read back you own stories, your own mistakes are invaluable lessons and not having the option to do this, because you depend on a service provider, where you have no control saddens me deeply.
Get a WordPress and make posts disappear automatically after X hours - this is ~5 mins to set up and this way you can both keep and retrieve your stories from the public.
Once this is done post to Snapchat from that blog; via webhooks, bots, whatever. Yes, right now, this is tedious and requires technical knowledge, but the goal is to own your data. But do not store the only copy your original content somewhere where you have no control at all. (See http://indiewebcamp.com/POSSE for the whole idea)