our DD cruised at age 5 months, 16 months, and 17 months. 5 months was probably the easiest, because she would sleep anywhere. it was trickier at 16 and 17 months because she got really overstimulated by what was going on on the ship, and just liked to climb up and down the stairs all the time.
but, we are taking her on the Wonder at age 20 months. I think she's really going to enjoy it.
i say, "go for it"! your 10 month old won't remember it, but it is fun to spend family time together like that!