Just got back from Disneyland (CA) with an 8.5 year old, 5.5 year old, and 12 month old. I wouldn't change a thing. Of course it might depend on your baby's temperament, but in general I believe it's no problem. The little one seemed fascinated with the colors, lights, and even the characters. His expressions were priceless (at 1 year, I believe they are a little too young to have the character-related freakouts some toddlers have). He was even able to go on some rides with us. True he won't remember it, but he did EXPERIENCE it. And we, his family, will remember it. As someone else said, it wouldn't be a family vacation (to my mind) if someone was missing - I would have spent the whole time thinking, "Awww, B would have loved this!!!" He took lots of naps in the stroller, sipped his bottles, nursed wherever, tried our food and treats... it was all fine. Better than fine! The only meltdowns we had were from the OLDER kids, lol. There is also a parent switch pass which is a great thing - here's how it works - if there are rides the baby can't go on (or that any kids want to skip), you ask the attendant for a "parent switch pass." One parent waits on line, the other takes the pass and waits with the kids (or has a snack or shops or whatever). When the first parent comes off the ride, the second parent goes in through the exit (or fastpass line) and gets to ride right away without waiting in the whole long line again. The 2nd rider can bring one other person with them - my oldest got to ride several rides 2x in a row that way, becuase my 5yo didn't want to go on certain ones. Anyway, good luck with your decision and have fun!