We've taken 4 of our kids as babies (8 months then 20 months with twin boys, 6 months then 1 year with DS4, 5 months and she will be 18 months when we go in Nov) and they've all been great! Wonderful vacation memories for sure! We take it slow, use a stroller and baby carrier, make sure to plan ahead with fastpass (and use rider swap), take plenty of breaks. We've learned our kids have a 4 hour span where they are happy, so we make sure to be leaving the park before the meltdown. We usually go to the park in the AM, spend 4 hours, go back for lunch/pool and then head back in the late afternoon. Works great and we rarely feel like we're doing too much. We bring snacks, waters and go with the flow. And plan lots of resort time where we can relax and not go to the parks. We've always traveled with the kids and while it makes for some crazy stories sometimes, they are all wonderful travelers now!