We came from the West Coast and half way through my planning rope drop mornings, I realized we would be trying to get to the gate by 5:00 am our time. No thank you, as I could envision tired grouchy people shuffling to parks on a death march.
I shifted our entire schedule to shutting down the parks and doing late extra hours. The vast majority on this board would have told me I was making a huge mistake missing rope drop but I trusted myself more to know the goals of our family vacation, so I ignored the advice. My plan worked perfectly. My point is to gather information and opinions, but trust that you know your family best.
Bring (or rent outside the park) a GOOD stroller (not an umbrella). Get one that is big enough and lays down flat with a big canopy. You can rent a City Mini or Elite stroller for $65 per week or so.
My child grew up at
Disneyland with multiple trips since he was one. He is 7 now and the stroller has been retired but we still laugh about him being asleep in the stroller before I had it fully turned around after fireworks.
The key is to have that comfy stroller ready at the exact moment they get tired and be able to bring them back to the hotel. We were at GF so didn't wake him to get in monorail and at DL, we stay on property so just wheeled him back to the room, wrestled on Jammies, and deposited in bed. Busses and cars might present a challenge.
I also have drinks and food stashed on the stroller and one "bridge" snack that if I misjudged and feel a melt down potential, I can hand to the child and get enough time to get out of the park. It isn't to try to get one more ride. I'm only buying time to get back to the hotel. It is a special snack that isn't pulled out unless needed for that purpose.
In literally 25 multiple day trips since age 1, we have had exactly one meltdown, when I pushed one more ride before lunch break. As soon as we got to stroller, he passed out asleep (age 2) and slept all the way back to the room. Had that stroller not been readily available, it would have gotten bad. Plan good safety nets and ignore anyone that tells you not to bring a stroller or "see if you need it". Demonstration of that "need" is ugly. Bring a stroller as long as you can. We used one at WDW for 6 year old, parking it for longer periods during the day.
Good planning, a good stroller that you can take out of the park, and awareness of your child will make you golden.
PS I couldn't care less what someone else thinks... good or bad, but I do feel responsible to do everything I can to set up a tantrum free trip and remove the child (or adult!), if one occurs.