We love CBR. What's nice with a little one is that there is a small area that is seperated by a curtain where a pack and play will fit, be dark and not make everyone else sit in the dark. It is very family oriented, with lots of places to go for a walk and several playground areas as well as a main pool - being redone and due to open in fall 08 - there are also smaller pools in each 'country', beaches for sand play - no swimming, and water sport rentals right there. If you pay the little extra for preferred location, it is a very short walk to the food court. Bus service is excellent, food court decent, staff are wonderful. It comes with a fridge vs. renting at a value. I don't think a deluxe is worth the extra money and not sure that you would fit six in a room anyway. Moderate, you can probably get two rooms, same price as one deluxe and have room to spread out.
Good Luck - you'll have a blast. Just Plan, Plan, Plan - especailly with a 4 year old. The was the year we first took our daughter and I'm so glad I planned like a nutcase - everything went smoothly.