I agree with everything else said about strollers, leash backpacks if needed, going slow, not overplanning, saving money, and snacks! All the snacks! Also have a good hydration plan for the kids and adults as it’s so easy to get dehydrated quickly there. We took our twins at 2.5 and had a great time. DH and I did have to RS or just go on separate rides a few times since we also had DS4 with us too, buy it wasn’t a big deal for the most part. The bubble wand idea is great as I remeber ours being fascinated with those. And I also second the advice about different personalities. One of our girls was really into characters and the other was scared, even with the princesses. The one that loved the characters was scared on FEA (the snow monster) but the other one loved it. So just be prepared that they may have very different reactions to things. And while I think most families do better with sticking to RD and early bed times, mine actually seemed to do better staying up just a little later and not having a rushed morning.