I've done 'Ohana dinner solo and had a wonderful time! I plan to do it again on my upcoming trip. I made the ADR for 2 and just told them at the podium when I checked in that I was a party for one. I also requested a table with a view of "something to watch" while I was eating, since I was alone. I ended up with a perfect table with a view of the grill area, the entertainment, and the castle. My service was very good. Many servers stopped by to speak to me during my meal. Not once did I feel awkward or uncomfortable to be dining solo. Yes, it is a lot of food, and some of it did was wasted, but that is usually the case, even when dining with a group. Go ahead and give it a try!