"My friend wants to put a FREE HUGS sign on me" Don't wear any signs, they used to be allowed at Otakon a few years back, but not anymore. I'm sure you could get away with a shirt that says that, but be careful...they may people you don't want hugs from ;P
And i've seen people cosplay on Thursday. In my opinion, it's hot enough as is without wearing a costume! And if it isn't boiling hot, it's pouring rain. So I just find it way more comfortable to come in your regular clothing and just have fun pointing and laughing at all the people sweating like crazy in their costumes (just messing)
