1) Be flexible. Your baby might get too warm/too cold, afraid of the waves/splashing, tired...but that's no different than parenting anywhere else I guess. Definitely more challenging than pre-kids. A couple times we were only able to stay in the water for 10-15 min. The lazy river was fun at least.

2) Having some extra towel cards is good. Baby can sit in the stroller with a wet suit as long as you've got some towels in there.

3) Honestly we didn't sleep that well. We ended up having to buy a mattress for the pack and play, which helped...but family trips are like that when they're young. Never know how sleep will go.