I have an AP and I often go to the park alone. I feel so calmed and relaxed while I'm there and afterwards. Those days are like therapy to me. Eating alone isn't really a big deal either. I had lunch in France on Easter alone and took my book and relaxed and enjoyed the food and a/c. Hope you enjoy your trip.
I also have a Florida residents annual pass (seasonal) no summer visits, too crowded anyway

and eating alone at the Food & Wine Festival in October is fine cuz you really aren't alone around World Showcase
Last year I went on a solo trip just to see Jon Secada during the Eat To The Beat concert series, stayed at the Boardwalk so I could walk/stumble back to my room after F&W fest
Arrived around 8:30 am.. almost ran to Soaring... love that ride
Did the single riders line on Test Track and met this nice couple in our car, I passed them a few times around World Showcase and we stopped to chat each time
Later that afternoon
Strolled back to Boardwalk area to ESPN Zone to check out the Miami Dolphin game OMG that place is packed on football sundays, thought Hmmm how about the Boardwalk pool bar to watch the game, yup it was empty, couple of people at the pool bar enjoying the sun and games on tv..
back to Epcot
Had a great time the first two shows Jon Secada performed then got a little hungry for more sushi over in Japan so I missed the 3rd show, but was able to get a great spot on the World Showcase lagoon rail to enjoy Illuminations Reflections of Earth
Overall a wonderful day
I can say to any solo guest, you will feel great the whole visit, I mean come on, it is the happiest place on earth

Mickey is so relaxing and enjoyable to visit.
Most likely doing the same thing this year since Jon Secada is scheduled for the Eat To The Beat concert series on a weekday Thursday Oct 6th and Friday Oct 7th