It’s completely up to you if you want to submit them together or separate. If you decide to do them separately, you would upload one to deviantart, and the other to either tumblr, archive of our own, or fanfiction.
Once it’s uploaded and ready to go, it’s best to send me a link to the entry through email, and I’ll either reblog it or post a link to it on the tumblr. And, if it’s a tumblr entry, just be sure to tag the blog in it.
You’ve still got plenty of time, so fine tune to your heart’s content! ^-^ (I can’t wait to see them! :D)