Only the Disney owned and operated stores at Disney Springs are "a given" for accepting Disney Gift Cards. The 3rd party stores may or may not accept them, and that changes all the time. Those stores have to sign up with Disney to access the Disney payment systems. And Disney charges a fee for that. Giftcard system is separate from the MB charging system, so there are multiple fees, potentially, and a lot of the stores opt to just not do it. I've never seen a list from Disney. The Disney web site just says "participating locations" without giving details. I know the Vera Bradley store does accept giftcards - or did last October. We had a nice chat with the store manager which is where the info above comes from.
You pretty much have to ask at the store when you get there (or call them). Not particularly helpful to you, I know, but kind of the reality of the situation.
Steve