... will there be somewhere in the Festival Center where you can activate your EF&WF magic band & load it with money to start making your food purchases? i'm sure when everything went to your room, you could do all of that at the hotel before heading to the park. now that the bag will only be available AT the park on the FIRST DAY of use (absolutely no early pick up per every CM I spoke to so far), ...
The F&W MagicBand can be used in place of your regular MagicBand, but it can't be loaded with money (neither cash nor CC credit). Last year's F&W PP goodie bag contained the exclusive F&W MagicBand for package holders, but the bag also contained a wearable F&W-themed Disney Gift Card (gift card with a curly bracelet). The GC in PP goodie bags was loaded with $50.
In 2015, there's no wearable, loaded F&W Gift Card. Instead, there will be 4 entitlements for F&W kiosk food and beverages. It might work like 2014's Late Night Live Credentials, which had tear-off entitlements for F&W kiosk food and drink.
While you're at the F&W Festival Center to pick up your credentials, you could purchase a 2015 F&W Disney Gift Card. They are available there, and many other places within Epcot. They're packaged on a larger card that is simply hung on a display rack. I don't know if they are pre-loaded. But they are re-loadable.
You might already know this, but if you have
Disney Dining Plan, you can use your snack credits to purchase food and non-alcoholic beverages at the F&W kiosks. Those DP snack credits can be deducted using your MagicBand.
ethanwa is a MagicBand collector and devotee. He has everything MagicBand, and runs his own website on the subject. He has a post with the probable design art and colors for this year's F&W PP MagicBand.
http://www.magicbandcollectors.com/preview-the-2015-epcot-food-wine-premium-package-magicband/
Here's a pic of the previous 2014 F&W Disney Gift Card: