Thanks for starting this thread! I've been keto for almost 2 years. Our last trip to Disney was Feb. 2017 when I ran the Glass Slipper Challenge. I decided that, once I was done with the half, I could eat whatever I wanted for the week. Mistake. Big mistake. I felt terrible. And since I'd gotten myself re-addicted to carbs, it took me weeks to get back on track. Our next trip isn't until March, 2019, but I'm already planning! I found a great post today, here, on the Dis Boards, about cheese plates. There are a lot to choose from and at least 1 in every park. I started IF and EF about a year ago, so I plan to use that as a tool while vacationing. There are no "quintessential" Disney snacks that I can't live without.
Have you been on your trip yet?