Maybe I am reading your comment wrong, there
are steps at the AB buildings.
BUT there are accessible ramped sidewalks, too. Here is a picture of AB Building 14. Notice the stair railings. This picture comes from
http://www.portorleans.org/
They have other photos in their gallery of the steps at other AB buildings. What the pictures
don't show you is that there are gentle sidewalks also leading up to the buildings nearby to the steps so that the buildings are easily accessible. The landscaping covers your view of them.
We were in Alligator Bayou section last November, Building 15, on the first floor in a handicap room. I have my own
scooter. The ramped sidewalk to reach our room was in a convenient location. We had no problem accessing our building or our room. We liked Building 15 and Building 14 because they were close to the food court and there was a short-cut path to the main bus stop from there.
If you haven't explored the portorleans.org website, it is full of great info. Enjoy your stay.