There are baby changing stations in the majority of both mens and womens bathrooms. In addition there are 2 baby care stations. One in DCA one in DL. The one in DCA is located behind next to the Mission Tortilla factory behind the big containers to hold the indredients for the tortilla's. Just keep walking past the factory, toward the gates and it's on the right. (opposite side of the building than where they sell the food). This one also has a companion bathroom. Which is nice because it is a lot easier. This is also the lost children area for DCA. They have a table with books and a tv with videos.
The one in DL is located at the end of mainstreet next to the Corn Dog Cart. They have a little basket of books out sometimes and some rocking chairs.
For both you must park your stroller outside. They have changing tables, high chairs, place for nursing, microwaves. Plus sell formula, diapers, baby food, bottles, sunscreen, pacifiers, just about anything baby related. They have little potties for those potty training and trained (my 6 year old still prefers to use the baby changing centers when she has to go). I prefer the one in DL, but both are nice. It's air conditioned and you can sit and relax for a bit on a hot day. They will warm food and bottles, etc. They are wonderful areas and I have been using them since my daughter was just short of 2 months old.