When I went at the end of June I paid for club level, but requested a lower level balcony resort view room. Sorry I can't help you with room locations on the 11th and 12th floor! If you want space to spread out during nap times, a studio suite might be just the thing. I have seen pictures of them (can't find them now) and they have a table and chair area as a bump out to the normal room. That would give you more space and no one would accidentally bump a bed!
We really enjoyed club level when we went as it allowed us to eat breakfast there each morning before we went to the parks. It also allowed the "eating machine" to eat once with one of us, then the other, and sometimes the third time with his sister. My kids are both constant grazers so during the morning hours and evening hours they enjoyed going up there to snack while we attempted to get a quick nap in before round two of the parks, and dinner, would begin. MommaT and Thabo are wonderful up in the lounge. They are both very personable and totally priceless! Both of my children loved them!
I know there are others on the Swan/Dolphin thread who have booked different suite configurations. If your question isn't answered here, please feel free to redo it over on the Swan/Dolphin thread!
Whatever your decisions, you're going to have a wonderful vacation!
Debbie
EDITED TO ADD:
I just reread your original post and realized you only have one child. Why not go with a king room with a pull out? I believe either the Swan, Dolphin, or maybe both have this option. That would leave plenty of room in your room for walking around, napping, and TOYS! This would definately save some money you can use towards a great dinner!