That's a really good idea!
Good question @Giraffedolphin26 in response to your question:
Like @Berrymelon said, the Hopscotch Team will know if you're entring by you putting #HHC in the title
I haven't checked Hopscotch yet but I think they should make it #HHC15 for this year if they're still going to go with adding a tag to the title. I think having a temporary tab would be a good idea like @Berrymelon and @SUPERSWAGGY suggested.