Hermione is a common wand, so I know they *should* have it there. Just in case, bring whatever wand she has, but stop and see if they have the actual wand.
I believe they also have robes.
Fluffy thing = pgymy puff, schumigirl. Unless you meant the 3 headed dog plush named Fluffy.
She's going to be hermione for Halloween....I imagine I shoudpnt count on them having wands in stock and bring our own?