We did it last month at a non disney water park (Splash Country in TN) with my neice, she is 8 months and it went well, BUT we had lots of help. It was me & DH, SIL & BIL, MIL & 13 yr old neice plus the kiddoa (8,7,5, & 4). We basically would take turns with an adult or two staying with the baby in the lazy river, one of the water playgrounds with shallow water that she could sit and splash in, or under an umbrella with her in her stroller. It was HOT so we took her in the water often to keep her cool (when she wasn't napping). She is an angelic baby and rarely cries and is very patient (will sit for a long time w/out a peep and just play alone), so we could just be lucky. Now if it had just been me and DH w/ the baby there is no way we would do that, it just wouldn't be worth it.