RollTide, I've stayed in cabin 7125 on the Wonder, and it's a great location. If you continue down the hall to the back of the ship there is a wooden door with a porthole window...go through that and you are on the aft verandah. There's often no one there, but they sometimes have events there also. It was decorated for a wedding or vow renewal one day on my cruise....the next morning they hadn't replaced the lounge chairs yet. The door is usually locked about 11PM (that varies).
Also at the back of the ship is another staircase that goes up to deck 9 (not the aft staircase on the map) and also goes down to deck 5. Well, it actually goes to deck 4 and you will do that on your lifeboat drill....it enters Animators Palate through a cast member only door.
Enjoy your cruise!