I agree with this, to a point. If you don't know what your hopping plans will be until day-of, I wouldn't make any ADR's until that day. Unless it's an incredibly busy time of year and if you are flexible with where you eat, you can typically snag something day-of once you know your plans. For example, we decided to go to EP one morning, without having any plans. I knew we would want to eat lunch there, so I got on the
MDE app and found a 1 pm Via Napoli reservation. I didn't know if walking up would be a possibility and I hate spending time walking over to restaurants only to find they can't seat us! So, I would just wait until day-of and you know which parks you are visiting and then check the app, see what's available and snag the ADR then. Just know, once you make that day-of ADR, you will be subject to the no-show fee if you don't go, but I do find this gives us the most flexibility while still allowing us to secure a table at our desired meal time.