What to Cosplay?

So, I will be attending a convention in June called Colossalcon. I will only be there for two days and i don't want to bring too much luggage...  So I'm struggling with what to bring. I know for certain I will be wearing my Party Poison (My Chemical Romance/ True Lives of the Fabulous Killjoys for those of you who do not know) because I am in a Gerard Way group with two of my close friends. But what other cosplay should I bring? I know that there is a ball and I thought of asking my friend to go with me. I know she'll be wearing a dress so my thought was to bring my Ciel Phantomhive (Black Butler) and be her "date"? On the other hand I have just recently finished my fem! Majora's Mask Link cosplay and wanted to wear that as well as maybe my Skyward Sword Zelda cosplay. Anyone have any idea's? I'd really appreciate the help! I'll tag some pictures on here so you can see them!





 *comes with Master Sword and playable Ocarina*