I'm in the same boat. While not at WDW now, am considering this for a last minute Sun morning thing for my fall vacation. I've been there at dinner (with a ressie) and there were many empty tables because it is out of the way for many park guests. My gut instinct is it probably isn't needed unless 1) its a holiday long weekend or during peak attendance eg holidays, March Break, peak summer, etc. or 2) you have a large party.