The beds at CBR were changed to queens a couple of years ago (except for the Pirate rooms) . Some rooms now also have the kid size Murphy bed.
You can Google CBR map (may have to spell the full name). It will show all the bus stops. There's one for each village. Although the closest stop for Aruba 51 is actually the Jamaica stop. They will be within a minute or 2 walk to your room.
How long it takes to get to the main building and pool depends a lot on how close to the bridge your room is. Bldg 51 is at most a 5 minute walk. If you're in 56, add another couple minutes.