We have stayed at SSR three times (1 Grandstand w/ kids - 2 at Congress Park w/o kids) Both were perfect for our plans. Grandstand has the first bus stop - key if you are going to the parks and with kids. Also, it has it's own kid-friendly, themed pool - plus close walk to the heart of SSR (food, activities). Congress Park is closest for walking to DTD and has some lovely, yet quiet views of DTD. It has a quiet pool.
We have not stayed in the others but have heard many like the Paddocks and Springs (right in the middle of everything). Our only concern with the Springs was that since it is the 5th and final bus stop, the busses were often full when they arrived.
SSR is a fabulous, stunningly landscaped, peaceful resort. We love it and hope you will, too.