We just returned from our trip on Sunday. We have a 10, 8, and 2 1/2 year-old. We also took our toddler when he was 22 months old. I can say with confidence that he was much easier to handle this time at 2 1/2 then he was at 22 months!! At 22 months he was not able to stand in line with me at all for anything, without running away. But he has always been a runner. I'm not sure about your child, it is all about personality of course. He had no trouble at all sitting through meals in the high chair, especially not character meals and he is a very good eater and will try most anything food we put in front of him. We always had our iPhone with YouTube kids for such situations just in case though LOL (yep, we are those parents).
He loved all of the rides that he was able to go on, it's a small world, toy story, Buzz light year spin, people mover, hunted mansion, etc. and most of the shows except for its a bugs life and turtle talk with crush was too boring for him, he absolutely loved monsters Inc. show but he adores Mike and Sully! He hated Fantasmic!, too scary.
All in all, it really depends on your child's personality. We did take a leash backpack to put on him just in case he decided to run away this time, but did not run into any problems!
Also, we stayed offsite so we were not able to take midday brakes back to our hotel. He just napped in the stroller or we would take a quick break in an air-conditioned restaurant or the baby care center if needed.