Pools are bacteria filled in general because there are many older children and adults who do things in pools they shouldn't. As far as splash pools, that's all I was thinking, because after all, he's only going to be one.
I was thinking of doing the blow up pool option anyway.
Any other thoughts on bringing a child that young? With my older two, we waited until they were 3 and potty trained before taking a cruise with them and had a break from cruising between the two. This one was a little unexpected but a pleasant surprise and decided to give it a go.