We stayed at WL in a bunkbed room (same size as room at AKL) and honestly I don't think there's enough room. Anywhere you would put the mattress would block access to something, either the bunkbeds or the bathroom. I guess as long as no one needs the bathroom after lights out, you might make it work.
You do realize that only 4 people are allowed in that room, right? Are two people not wanting to share the queen bed?