Hi Beth,
A Finding Nemo suite at Art of Animation is going to put you right in the heart of the resort. I don't think you can go wrong with any location there. Even the Nemo suite farthest from the center is probably less than a minute's walk away.
The Nemo suites are in two T-shaped buildings on either side of the Big Blue Pool,. The tops of the Ts flank the pool. It is a prime spot as you can see on the
map of Art of Animation.
One of the many, many things I like about this resort is that the buildings with the suites have interior corridors, which cuts way down on the outside noise.
You also will be just steps away from Animation Hall -- home to the Landscape of Flavors food court, the arcade, the Ink and Paint Shop, the front desk and the bus station. The one thing you might want to consider is whether you prefer a ground-floor room or an upper floor. If you expect to go back and forth to the pool and food court a lot, a ground floor might be a good option to save time waiting for an elevator or using the stairs.
I'm sure you and your family are going to love your stay at Art of Animation. It is so beautifully decorated with extreme attention to detail.
Please let me know if I can answer any other questions for you as your vacation gets closer. October is a beautiful time to visit the Walt Disney World resort. Enjoy your time with your family!
Wilma