No, there won't be. And you probably won't be comfortable at Shulas in straight from the park clothes - its one of the few restaurants at Disney where that is true. (You can do it, but you might want to wear particularly nice park clothes).
Its probably a 20 minute walk. The boat, if it is right there, may be faster, but the lines for the boat leaving Fantasmic will be long - it can take 40 minutes to clear the boat line.