You will have a great time. We just cruised with DS 8 months and DS 4 years earlier this month on the Wonder. If you plan to make spa and/or Palo ressies, get to those lines first and sign up, and then go directly to Flounders and select 3 times that you would like for your DS to be watched. Also note on the reservation form that you have spa/Palo ressies for that time. Even if you're not making spa/Palo ressies - go reserve some time at Flounders. Be aware that Flounders is not open all the time. We also reserved Flounders for about 3 hours for CC day so that we could be at the beach with just the 4-year-old for a while. We had a really good experience with Flounders, and since we had the beeper we felt very comfortable that if we were needed, we'd be paged. We took a small stroller (Carter's Very Hungry Caterpillar from Burlington Coat Factory). It is bigger than an umbrella stroller. I saw folks fighting with their big strollers - space is at a premium in the staterooms and moving around on the ship.
You are also going at a great time of the year. I greased everyone up with tons of sunscreen because I was worried about the Caribbean sun, but it was not as I thought. I had on SPF15 and didn't get burned - that was for a beach day at Atlantis and CC. I put 45 on the kids though. I had been concerned about the sun because I didn't want to spend my cruise time burned up.
Also - check in Mickey's Mates - they had some cute little girl's clothes on sale in there.
Have fun!
Caribbean Beach Oct 2003
Wonder Dec 2004
We're going again! Dec 2006