Yes, you can do both. I don't know if there may be a few restaurants at Disney Springs that won't accept gift cards, but most do. I think I even used them at both the Pandora and Coca Cola stores in DS.
I did read a post somewhere the other day that due to weather issues at that time some of the F&W kiosks were taking cash only. I usually always carry a $20 with me just in case their magic band readers or card machines aren't working.