If you are parked at SW (or the shuttle drops you off there) you can use a sidewalk to get to AQ. It goes down Sea Harbor Drive to a crosswalk across I Drive. Then there is a sidewalk from there to AQ. When you are at SW, stand at the entrance to the park (the park itself, not the parking lot) and start walking to the right, away from the Renaissance. This will lead you right there.
Just a hint, if you do decide to walk there. Once you cross I-Drive, the vehicle traffic will be going straight in. Don't follow them but turn to the left and go to the next drive, which is actually the exit. This will be a better path to the entrance of AQ.
However, depending on how much you like to walk, it is a fairly decent walk, especially if you spend all day at AQ in the sun and are worn out.