Certain buildings in AB are considered preferred- in fact, building 14 is preferred and it's already completed- it's right across from the food court and main area/bus stop. If you are staying next April, then all of POR will be finished with their renovations and as such, the accessible rooms will be available in all areas. Building 14 is not the only preferred building, but it will give you the most convenience. On the "renovation schedule" website, buildings 14, 15, 18, and 27 in AB are considered preferred.
From your other post I noticed you are concerned about your dd falling out of bed. You can request a bed rail for her, but I'd contact WDW reservations to have it noted that you need one. If it turns out you don't need it, housekeeping can remove it. Better than having to bring your own!
Hopefully someone will be in one of these rooms before your trip and can report back as to whether the bedding is queens or doubles. Even with the queen bedding it appears that there is adequate space for a w/c to get around in the room and into the roll in shower so I hope they are queens. If I had extra $$ I'd book a room there and include 5 Guests as now I'm curious too!