Your title mentions the festival. Did you mention it because you want to attend or because you are worried about crowds? Based on the Magic Key block out dates, Disney is anticipating larger crowds from March 23-31
The festival is in DCA which draws a lot of local, Magic Key holders away from DL. Food booths open around 10:30. The lines for festival food are long for the first hour or two.
Park Hoppers is nice for flexibility, for dining, and for shows.