Planning a buffy cosplay

We saw a tiny girl in a Buffy cheerleader costume at Comicpalooza and it gave me the idea to do a family Buffy cosplay.   Sarah as Buffy, naturally, Rob as Giles, me as Willow, Seth as Xander, and Sylvan as Oz.  Rob's Tom Baker costume is easily transformed into Giles, all he needs is a real tie and a sweater vest.  Xander and Willow dress like they shop at thrift stores anyway. All we need are stakes and we can hunt down all the zombies that show up at the next con.  The only problem is if we go to a con and we don't have Seth and Sarah that weekend.  Would anyone know who we are without our Buffy?  So then I thought if it were just me and Rob would could be Vampire Willow and Xander.  That would be a lot of fun.   I think it would  be pretty easy to put together in time for Walking Dead con, although it's looking like we'll end up at Wizard World Con in San Antonio first with no kids.  Here's some research I put together last night.