Just because there are no preferred rooms left during your stay doesn't mean you won't get a good location. You can still request a room in either Jamaica or Aruba. They are both just a short walk from Old Port Royale where the main pool/arcade/store/full service restaurant/hair wrap station/food court/hot tub/marina are located.
We stayed in Jamaica building 41 and we were less than a minute walk to the Jamaica quiet pool and beach, about a three minute walk to the Jamaica bus stop and about a 5 minute walk to Old Port Royale.
We really enjoyed our stay at the CBR. So much so that we booked our June, 2007 stay just days after arriving home from our June, 2006 stay. Everything was so bright and colorful. The grounds and beaches were well maintained. I loved the fact we could laze around in the hammocks on the Jamaica beach and watch the Epcot fireworks at night.
In all honesty, I think all the maps make the CBR appear to be HHHUUUGGGEEE
when it didn't feel so extremely big when we got there. The resort is large and spread out but that also means the guests are spread out and you never feel crowded in.
I really think you would enjoy a stay at the CBR. Have a safe and fun trip, Lisa