The Grandstand is the first bus stop to pick up and drop off. You might spend a little more time on the bus on the way to your park, but you are just about guaranteed to get on the first bus, and you will be dropped off first when you are heading back to your room.
There is a nice "quiet" pool nearby and it is about a 5-7 minute walk to the main pool.
Definitely our favorite area to stay if we are heavy into park mode.
Congress Park is nice if you plan to spend much time at DTD, as it is very close to walkway to Marketplace and boat to West Side. It also has a quiet pool and is easily walkable to the new pool.