I am keto at home, but not strictly keto at Disney. I do a lot of dinner TS though, to be able to have my meals the way I want them - veggies/meat/seafood. I take almonds and quest bars in my bag and eat Turkey legs/rotisserie chicken/deconstructed burger for lunch. I was never a morning person, even before keto, so I usually do tea, but if I find myself hungry, I usually get an omelet or if it needs to be quick, I'll order the bounty platter at QS and eat the eggs, sausage and bacon.
That said, I cheat if I feel like it (I'm a sucker for basically anything for the French bakery and ice cream shop). It's vacation! I'll be strict when I'm back home.