The only time that I make a reservation is at city walk for a Saturday night
If you eat at off times , you can get by without a ressie
Do lunch at 11:15 or after 1:00
Do dinner at 4:30 or at 6:45-7:00
You will have some of the places with light crowds
Most do lunch around noon
Then do dinner around 6 if they are in the parks
You could do a breakfast early at the hotel then do lunch at about 1:30-2:00
Hit city walk for a late dinner around 8:30
I have not had issues to be seated for lunch when i go early or after the lunch rush
If you feel more comfortable with having a reservation, go for it
I have not found them necessary except for Saturday nights at city walk
Locals come to city walk on Saturdays at times